100% Simpson style but without the price tag: Simpson Speed Bandit Review. AGV K5-S Sizes Having owned a couple of different AGV … Shopping For A New (Or Your First) Helmet? Detailed Motorcycle Helmets reviews, along with specs, comparisons and guides to help you make the right choice. It’s all a reasonably standard configuration in helmets these days but the devil tends to be in the detail – it’s how well the systems designed and manufactured that makes all the difference. Score:  I’ll give the overall face shield and operating system an “Excellent”. The helmet exudes quality and it includes some outstanding features and good comfort. I think the K3 has a fit that is almost identical to the AGV Stealth (review), which uses two shell sizes to span the range. And — wonder of wonders — they indeed provide excellent ventilation, as I’ll describe in a minute. Graphics $289.95. The only difference that I know of is that k3 has many more reviews on YT and costs a bit more. So, here’s all you need to know about the AGV K1 helmet including how well current owners say it does (or doesn’t) perform. For more information on helmet noise, visit the wBW Motorcycle Helmet Noise page. Click through to read the most comprehensive Icon Airflite helmet review on the web. 14 … Motorcycle Transportation Companies (USA, EU, UK, Canada). The worst culprit, however, is the feel of a liner. Shoei RF-1400 review: a fantastic all-rounder Snell certified helmet. For some background, the K1 is the replacement to AGVs K3. ... AGV Corsa R vs Shoei Rf-1200 ... AGV K-3 SV vs AGV … So, if you love the looks of a Rossi helmet (or a McGuinness, Morbidelli, Martin, Hillier – in fact the list of riders who wear a Pista GPR goes on and on) but can’t afford or don’t need a helmet costing over a grand – and if you’re after a sporty helmet from a maker you know you can trust, then we reckon it’s going to be well worth checking out the new AGV K1. In-depth guides to help riders understand what to look for, how to weigh options and make good buying decisions. Again, that’s a problem for pretty well all helmets – though with the great ventilation on the K1, it does clear away quickly once you’re back on the move. Each market gets basically the same designs, with the AGV Miglia flip-up (review) and the AGV Stealth (review) listed in the Street segment in North America but in the GT Series segment in Europe. Let’s begin! Inside the K1, you’ll find a removable/washable comfort lining containing moisture absorbing Dri-Lex fabric. I think. Owners say it's comfy, very well vented and an all round great helmet to live with. For comparison purposes, see the wBW Motorcycle Helmet Weights page or the Motorcycle Helmet Shapes page for a listing of all of the helmets we’ve reviewed along with their weight and internal shape. But overall, the AGV K1 should be quiet enough for most riders. Difference between AGV K3 and AGV K3 SV. At the opposite end of the price scale is the K-3 SV. From “R.F.” (November 2013): “Congrats on your site, very very helpful. Your email address will not be published. If you’re a 62 or slightly above, you may also want to try an XXL on for size. But with AGV’s record of producing some really effective thermoplastic helmets, coupled with the fact that, at the time of writing, AGV are our second safest helmet brand, then it very much looks like you can trust a helmet with AGV on the front to give pretty amazing levels of protection. AGV helmets sold in the European market are categorized as Race, GT Series, Off-Road, City and Street Road. Always fancied owning a range-topping track helmet like the AGV Pista GPR or the slightly cheaper Corsa R, but just can’t bring yourself to pay range-topping cash?. And many owners have been rating their K1s as quieter than average. I guess different shell materials?? One thing to note is that the neck roll at the bottom of the helmet liner in the rear could be larger or thicker. So far that’s pretty good for what (I paid). OK, there’s stacks of great alternatives out there if you’re just after a reasonably priced full face helmet – check out our top 10 full face helmets to start yourself off! It’s important to make sure that both sets of tabs are in their grooves when replacing the shield, because it will rotate downwards with only the main boss in place and the lower tab loose. Please click below to visit the AGV K1 helmet pages at our recommended stores – all checked for great online ratings. This website uses cookies to ensure you get the best experience on our website. I guess different shell materials?? Alright, so now onto a key K1 … The AGV K3 SV is the successor to the popular K3, with the SV denoting an integral sun visor. The new AGV K1 is designed to bridge the gap between these two helmets, … AGV K5 S, AGV K3 SV, AGV K1. Always protect your hearing when riding a motorcycle. 53-54: 55-56: 57-58: 58-59: 60-61: 61-62: 63-64: Scroll to view all sizes. Note that our helmet evaluations are a combined effort of several riders over time on different types of motorcycles with and without windscreens. AGV’s excellent budget sportsbike/track helmet: AGV K1 AGV's entry-level sportsbike helmet review: the AGV K1. My feeling is that the AGV K3 is an excellent helmet that definitely does not feel like an entry-level version. They’re capitalizing on all the dev work that their MotoGP and other racing teams have put into designing their race helmets and transferred it over into a much cheaper helmet package that’s bound to appeal to heaps of racing fans who’re running their bikes on a budget. 14 comments. The K1 is AGV’s lower-priced helmet, starting at £139.99 for plain colours, up to £179.99 for the Soleluna 2015; Andrew Wolfe of the BikeSocial Test Team has been using it for two months over a variety of roads on his Yamaha MT-07… And we’d expect the K1 to maintain AGV’s excellent reputation for safety. Please be advised … X. Size XS S M L XL XXL XXXL; Head Circum. More information on helmet fit can be found in the chart that lists the helmet weights of webBikeWorld reviewed helmets and also by shape on the webBikeWorld Motorcycle Helmet Shapes page. Thinner speakers, such as those used in the Scala Q2, for example, can be located on the liner itself, but basically the shallow ear pockets are probably not the best for speaker placement. It’s also got a quick release shield using AGV’s XQRS or Extra Quick Release System. This K3 in size XL weighs 1543 grams (3 lbs., 6-3/8 oz.). AGV SPORTMODULAR. AGV now also owns the MDS brand, a line of less expensive helmets sold in many markets. AGV lists the face shield as their “Street 8” version and tinted shields are available. A simple lift up of the visor will clear the fog. Helmet is comfortable and well made, works well if you use glasses like me. The helmet clear coat feels slightly thicker than normal and the overall finish looks very good, with deep and vibrant colors and metallic silver paint used in the stripes. We are talking about the K-1, successor of the K-3, the integral helmet of the most accessible range of the brand. You’re In The Right Place. Since our foundation in 1947, we have been designing motorcycle helmets to suit every style. This is the only helmet I have that suffer with this issue. Overall, the K3 face shield is easy to use, has good quality optics, seals tightly, is easy to remove and replace and it feels sturdy and reliable; more so than many other helmets I’ve tried. However, like the rest of its stable, the K1 has been carefully aerodynamically shaped to increase airflow and reduce wind resistance, which of course will reduce the amount of noise a helmet makes. Maybe the price is so low because AGV can’t count well, but it has generally improved upon the K3’s design. According to the American Academy of Orthotists and Prosthetists, no one method is considered the gold standard for establishing K-Levels.The rating is left up to the clinician doing the assessment, and … A few owners said it’s super stable and there’s hardly any buffeting even when turning your head and doing head checks. The shield does have Pinlock pins (good) but doesn’t come with the Pinlock insert in the box (not so good) so expect to pay $30ish extra for a Pinlock antifog if you live somewhere wet/cold where your shield is bound to mist up from time to time. So I’d buy again but not the black matte version of it. Always fancied owning a range-topping track helmet like the AGV Pista GPR or the slightly cheaper Corsa R, but just can’t bring yourself to pay range-topping cash? Note also that perceived noise levels will vary, depending on the individual. Another notable feature of the K3 is the excellent fit of the face shield to the eye port gasket. The smooth … None of these are obvious to anything other than a very close inspection, and it is probably more difficult to control for dust if indeed the helmet shell is painted rather than covered with a decal. The EPS liner has very shallow pockets for the ears, which can make the helmet feel slightly tight at the sides, but this is something of a problem when fitting speakers. The helmet exudes quality and it includes some outstanding features and good comfort. Blue coloured texts contain redirection links and new tab will be opened when you click on these links. In a nut shell we have ridden in the AGV K3 and feel it is a solid choice. Perhaps it’s a matter of cost, but all of us here agree that AGV would do well by having the Rossi graphics available in North America — although perhaps they are concerned that doing so might crib sales from the Race helmet lineup. So, if you're after a new motorcycle crash helmet read the reviews … Evaluators wear correctly fitted, high quality ear plugs (even when evaluating motorcycle intercom systems). At 22 inches exactly, I tried a small because other buckets have not felt quite snug enough. The K1 is made from cheaper materials – in this case thermoplastic – which is easier to form into a helmet shell which makes for a cheaper helmet to produce. Buy them online in our official shop. AGV’s entry-level sportsbike helmet review: the AGV K1. A couple of minor tweaks by AGV could make the K3 a much bigger contender, and the shallow ear pockets may be problematic for some. See our review policies for more information. Rating Scale is subjective: Unacceptable, Poor, Neutral, Very Good, Excellent, Outstanding. This seems to be a problem with many other helmets, including helmets much more expensive than the AGV K3, so kudos to AGV on getting this small detail right also. The chin vent is especially praiseworthy, as it not only functions well but it directs a very large volume of air through two large openings through the chin bar and thus on to the rider’s face. But a slight tightening up of factory tolerances here wouldn’t hurt. A more budget oriented price doesn’t mean that it scrimps on quality though. The visor on the AGV K1 is an anti-scratch material that has been designed to provide the maximum field of vision possible with a 190 degree horizontal view. The Airflite is a slightly 'out there' full face polycarbonate helmet that comes in a range of bonkers graphics. AGV is apparently not interested in playing up the color-naming scheme, at least in the North American market; “Basic Black” and “Mono Flat Black” are as exciting as it gets in the K3 lineup. Our reviews are hands-on, detailed, and unbiased. Aspire K Series: Tank and Coil Compatibility. AGV K1 Helmet – Entry Level Lid from Italian Helmet Titans. Product prices and availability are accurate as of the date/time indicated and are subject to change. They’re relatively easy to find when wearing gloves and they’re easy to use. The LS2 FF323 Arrow comes in either fiberglass or carbon versions and can be had for around $200 which is pretty amazing when you consider you’re getting a real MotoGP developed SHARP 4 star safety rated full face track helmet. First impressions are important when prying back the lid of the helmet box for the first time, and the K3 did not disappoint in this “Basic Red” color pattern, which is anything but. You have entered an incorrect email address! From “K.S.” (2/10):  “Thank you for all of the wonderful reviews ! List Price (2010): Solids $169.95. The AGV K1 Helmet has an aerodynamic shape, ventilation scheme, and spoiler developed for the wind tunnel tested Corsa R and Pista GP R. The shell and spoiler … It’s a polycarbonate-shelled crash helmet that takes its design from the latest line of AGVs that includes the Corsa, GT Veloce and Pista GP – meaning it has a sharp, aerodynamcially-shaped chinguard and rear spoiler designed to cuts through the air and reduce buffeting. It is listed as having an anti-scratch and anti-fog coating, but we noticed fogging almost immediately in cold weather. The K3 has a neutral internal shape and feels just a touch round at the top with very slightly narrow sides. The finish of the K3 isn’t perfect (e.g., one of the vent mechanism holes wasn’t cleanly punched out, there is a piece of dust under the clear coat) but it is the best looking sub-$200 helmet I’ve ever seen. The chin curtain and nose guard comes off once in a while, and have to push it back in. It’s a polycarbonate-shelled crash helmet that takes its design from the latest line of AGVs that … It does not seem to have a tab or molded nub that will hold it tightly enough between the chin bar liner and the helmet shell. Your review, though, was spot on as to quality for price; the K-3 is, I think, a well-designed and manufactured product. Both the Pista and the Corsa are SHARP five star rated helmets, meaning they’ll give maximum protection in an impact. Noise level is standard, and long rides comfort is on par with my other helmets (Shark S650, HJC CL-SP, Sparx S-07).”. I have wanted to purchase a more visible helmet for quite some time but the Scorpion EXO-700 Neon doesn’t fit my round head comfortably and the high price of the Axis Yellow Shoei helmets kept me from pulling the trigger. I wasn’t sure what to think about the K3 at first and, in fact, I was not at all familiar with this model, but first impressions were very positive and grew from there as I rode with the helmet, dodging our way-too-frequent snowstorms this winter. This, and the top vents that close tightly on the K3, make the helmet more water resistant than others (when the face shield is closed and vents are shut, of course). Required fields are marked *. That’s why you should always stick in some decent ear plugs when you’re going any further than a trip down the local stores. The top vents are beautifully recessed into the helmet shell with tight tolerancing, and the operation of the upper and lower vents is first-rate, with a solid feel. These are the snaps that attach the liner to the helmet. These are apparently not faults but simply part of the pattern, as if the painter was attempting to give the paint an airbrushed look. See More Motorcycle Helmets, Motorcycle Visor, Motorcycle Intercom. See the webBikeWorld Site Info page. Lots of owners rate it highly and say it lets a ton of air through if you open all those vents so that’s a job well done. The top vents are independent and they open and close with a small raised tab in the center of each. In fact, I’d say that what is “entry level” to AGV is top-drawer to several other brands I can think of — indeed, some of the features on the K3 are no doubt class-leading. Other than the vibrant color, what is most impressive on the K3 is the quality of the recessed top vents and the chin vent. The face shield fits very tightly with minimal gaps, although a very tiny amount of water did pass through in the leak-down test (water poured along the top of the closed face shield). Several features are noteworthy, including the venting system, the operation of the face shield, the comfort of the chin strap and the overall quality. The AGV K3 SV is the successor to the popular K3, with the SV denoting an integral sun visor. Plus noise-supressing materials tend to increase weight and adding more padding can reduce ventilation. Sportsbike helmets usually don’t fair well in terms of quietness because it’s simply not a priority when making a helmet that’ll perform well on the track. AGV's entry-level sportsbike helmet review: the AGV K1. Reviewing motorcycle products for over 20 years. Expect more graphics to be released over the coming months/years though, so to see more designs and find the latest deals on the AGV K1, please click through to our recommended stores using the links below. I definitely notice less “head toss” and turbulence movement with the K3 than other helmets. It’s very much an entry-level sportsbike helmet with most of the look and appeal of the Pista but for around a fifth of the price. All good stuff not indicative of an entry-level helmet in any way, shape or form. I have not found a dealer in Maine who has any AGV helmets on site for me to try, and don’t want to ask for another refund, so am continuing my search for ‘the’ helmet that feels right on and in my head. Comments are ordered from most recent to oldest. The high visibility yellow paintjob is optional.”. Editor’s Note:  The K3 in Rossi livery is currently being sold in Europe. Score:  I’ll give the AGV K3 an “Excellent” rating for overall comfort and fit. The face shield has 5 firm detents from closed to open, including a slightly larger than normal first gap for defogging. The removal mechanism used on the K3 is noteworthy also; it is very easy to use and it even looks good, in a sort of industrial-artistic way. The smooth external shape helps reduce noise and makes a noticeable difference in reducing head toss. The painted surface does, however, have several dust bits and tiny bumps here and there under the clear coat. I do wonder about the thinness of interior padding, though – it seems to me that slightly thicker padding would would help the helmet fit the head instead of the head having to conform to the shape of the EPS mid-layer. Changing the visor is easy, the vents work well and it is significantly quieter than my TZ-R probably due to the lack of ear pockets. The padding overall is slightly thinner than normal but this doesn’t seem to affect the internal comfort, although I could feel the two snaps pressing on my forehead at the top. Owners don’t find weight a problem (in fact most think it’s a light weight helmet). Shark S900 Helmet Review; Shoei. AGV K3 5-Continents Helmet , Distinct Name: 5-Continents, Gender: Mens/Unisex, Helmet Category: Street, Helmet Type: Full-face Helmets, Primary Color: Blue, Size: Lg 032150A0015009. The K3 has outstanding ventilation in the chin area and the top vents, which are also beautifully recessed into the helmet shell, also provide good air flow at the top. Why? Icon Airflite: funky all rounder helmet with innovative shield system. Don’t get me wrong, my head is worth more than the price of a helmet, but with so many inexpensive quality helmets on the market, paying $400-600 seems unnecessary…especially after reading “Blowing the Lid Off” (Motorcyclist Magazine) a few years back. A small chin curtain probably helps to make the venting system more efficient also, although the chin curtain on this example was loose when the helmet was new and one side pops out every time I take the helmet off, so I’m hoping it does not get lost. Probably. Custom Detents. wBW provides subjective opinions and information on hard-to-find and unique motorcycling products. The chin strap padding on the K3 is noticeably more comfortable than other helmets. according to sizing charts. Maybe the price is so low because AGV can’t count well, but it has generally improved upon the K3’s design. I purchased the K3 to replace a 5-year-old pure orange Shoei TZ-R (review). Title. AGV. All very good. Across the 125 reviews it scored a brilliant average of 4.5 out of 5 with 100 scoring the helmet 5/5 and 25 customers scoring it 4/5, so a pretty spectacular result for the AGV. Then the AGV K1 … The K-3 SV is the updated model to the K3, which was an extremely popular helmet from AGV, the K-3 SV essentially gets an update with a built in sun visor, it has also proven very popular because of the benefit of the space available making it compatible with AGV… And it’s difficult to tell, but the pattern on the Basic Red model shown here actually does look like it may be painted on, rather than the cheaper decal used on many lower-end helmets. And because it shares aerodynamic properties with its racing stablemates – including a rear spoiler designed to improve stability at higher speeds – the aero on the K1 (slipperyness, stability and reduction in buffeting on a sportsbike) is excellent. Noise can be caused by many factors, including helmet fit, the type of motorcycle and windscreen, wind speed and direction and even the rider’s clothing. My k3SV leaked and drips would run down the inside unable to clear. The only difference that I know of is that k3 has many more reviews on YT and costs a bit more. A 2 Minute Guide to ECE 22.05 (Regulation No.22) for Testing... All about the SHARP Crash Helmet Safety Scheme, A Good look at the Shoei RF-1200 Motorcycle Helmet. The AGV K3 offers a ton of value for the money spent. It also seems to have lower than average turbulence-induced noise around the bottom of the helmet shell. I just purchased an AGV K3 based on your review and the discovery of the bright yellow Rossi Celebr8 color way online for $180. Comparison of AGV K3 SV vs HJC IS-17 motorcycle helmets. Note: Item provided by a retailer, distributor or manufacturer with these Terms and Conditions. From “G.R.” (5/10):  “I purchased a K-3 via Motorcycle Superstore three weeks ago and, sadly, returned it because my head is a ‘grey area’ head: I’m somewhere between a medium and a small ( oval? ) But if you’re after a helmet that’ll work with your sportsbike, then here’s a few more to take a look at (and of course flip over to our top 10 sportsbike/track helmets pages). AGV SPORTMODULAR. The smooth external shape helps reduce Again, that’s only an issue for a sharp eye and otherwise, the finish is excellent with no other paint drips or faults that I can see. A few say that it gets noisy when you up the pace – but then what helmets don’t? As you mention in your new review of the ‘tech, holding my hand at the back of my neck reduced an already low level of noise. It fits well, offers a removable liner and is even available in Rossi Replica Graphics! And if you buy from any store, we get a small sum from the sale at no extra cost to you – a massive THANKS! It’s attached with plastic snaps to the inside of the helmet and is easily removable. All material and photographs are Copyright © webWorld International, LLC since 2000. After some months the latex layer began to drop and now it’s horrible. At the opposite end of the price scale is the K-3 SV. Shoei GT Air Helmet Review; Shoei NXR Helmet Review; Boots. Compare the overview, features, user reviews, price and select the best model. This may seem logical but we’ve seen too many helmets recently, including helmets costing three times as much as the K3, with no direct venting through the chin bar, which really is a must-have feature. Thus, it is possible that smaller helmet sizes will have a thicker EPS liner or padding while the larger sizes, such as the XL shown here, will have what feels like thinner padding, although the shell does not look or seem larger than normal, so it may have been designed to be as small as possible to span the size range. Note that the AGV U.S.A. website lists the K3 as having a “Micro-metric adjustment buckle”, which apparently is the double D-ring system. AGV K1 Helmet. I haven’t had the chance to wear the helmet for a long ride yet but so far it seems light and well balanced, true to size and comfortable. It is very close to the AGV Stealth (1536); Shoei Hornet (Enduro) XL, 1542; SCHUBERTH R1 XL, (1552); and the Shark RSX L (1553). Please click below to visit the AGV K1 helmets pages at our recommended stores – all checked for great online ratings. AGV uses what they call a “Perimetrical Visor Seal”, which is a thick round gasket that feels somewhat like neoprene wetsuit material. share. The K1 is AGV’s lower-priced helmet, starting at £139.99 for plain colours, up to £179.99 for the Soleluna 2015; Andrew Wolfe of the BikeSocial Test Team has been using it for two months over a variety of … Save my name, email, and website in this browser for the next time I comment. Agv K3 vs Agv K5 - Which Should You Buy? This happens only, though, when I am at a stoplight. The helmet exudes quality and it includes some outstanding features and good comfort. AGV K3 Helmet Review That the K3 is the most basic street helmet in the AGV lineup matters not. I can move my head to eliminate the noise, so I think with a bit of extra padding — which may actually be there on the smaller sizes, due to the single shell size — the K3 could be a very quiet helmet. It is slightly thin at 1.43 mm but the quality is good and it has a nice, large lifting tab at the lower left. In a nut shell we have ridden in the AGV … Your email address will not be published. The visor scratches easily but you’ll have no problems to buy another one. The AGV K1 Helmet has an aerodynamic shape, ventilation scheme, and spoiler developed for the wind tunnel tested Corsa R and Pista GP R. The shell and spoiler provide aerodynamic stability at speed and the spoiler itself features a passive rear vent to … Really well rated helmet and recommended for a lower priced helmet for a wide range of bikes. All rights reserved. Always fancied owning a range-topping track helmet like the AGV Pista GPR or the slightly … And AGVs quick release system is one of the best so you shouldn’t have a problem here. Dri-Lex makes for a comfortable lining that’s pretty wear resistant so should be a decent and durable interior. The visor is pinlock ready so you … The K1 is available in fitment sizes XS-XXL. Most other sporty helmets are a bit more than the K1, mainly because they use more exotic or complex construction techniques and also because with most other makers, their sportsbike helmets are the actual helmets used on the track in pro-racing! But they’re made from advanced composites and carbon fiber to achieve that level of protection. other useful information to help you when buying your next helmet, check our various guides - or have a look at our top helmet lists where we've got the top 10 rated helmets overall and best budget/safest/full face/flip-up helmets. Which is not to say it’s necessarily going to perform worse because many thermoplastic lids appear in the UK’s SHARP 5 star rating list too because much of the protective qualities of a helmet is in the design of the helmet as well as the materials and construction methods used. But the rest of the world gets a K3 (and a K4) in 12 different patterns, including 5 different Valentino Rossi graphics. If you’re interested make sure to check out our YouTube page as well if you want see our reviews of similar helmets to the AGV K1. The chin strap attachment system uses a plastic snap to retain the extra chin strap length. AGV K1 Helmet Review; AGV K3 SV Helmet Review; AGV K5-S Helmet Review; HJC. save. The liner material is soft and comfortable and appears to be very well made. So overall, the AGV K3 has excellent air flow, better than many other helmets we’ve tried recently. The liner feels like tiny sandpaper when I first wore it, and even though the issue is now lessened, this is the only helmet I ever wore that felt like this. AGV K3 Helmet Review That the K3 is the most basic street helmet in the AGV lineup matters not. The K3 meets DOT safety standards in North America and ECE 22.05 in Europe. The best way to fit the thicker type speakers used on the Interphone F4, for example, is in the shallow recess in the EPS underneath the K3 liner, but this means the padding is between the speaker and the ear, which can decrease the volume. This helmet should definitely be considered by anyone who wants an inexpensive helmet of good quality. Next, as someone else already stated, the visor gets fog up easily. Toys, Kids & Baby. The small chin curtain in front and the overall helmet shape does seem to mitigate noise volume, and although I don’t often notice this, the K3 seems to “cut” through the air noticeably better than other helmets. This thread is archived. It all features AGV’s Integrated Ventilation System or IVS which is their name for vents that pass air directly through the helmet shell and into channels around the lining. The gasket does seal all the way around the eye port though, unlike other helmets with have a gap at the sides. AGV AX9. Review of the Nolan N87 Helmet; Shark. The AGV K1 comes with a 2 year warranty (add another year’s warranty if you register the helmet with AGV online). Two sets of small plastic tabs hold it in place; one set is located at the main rotating boss and another single small tab towards the bottom. the visor seal is cheaper on the k3SV. Check out our Sportsbike or track helmets sections for more previews and reviews of helmets suitable for your sportsbike. The K3 has a rear always-open exhaust vent and two small exhaust vents on either side at the lower rear of the helmet. And if you buy from any store, we get a small sum from the sale at no extra cost to you – a massive THANKS! Bell Custom 500 Review: a great quality, low profile 3/4 helmet.