




🏍️ Gear up smart, ride fearless — the Sierra II is your ultimate road companion!
The O'Neal 2021 Sierra II Flat V.22 Helmet combines a tough ABS shell with lightweight design and advanced ventilation technology. Featuring an integrated face shield, adjustable visor, and a secure double D chin strap, it meets top safety standards (DOT & ECE 22.05) while delivering superior comfort for road, enduro, and adventure riders alike.















| ASIN | B07GZD7XZC |
| Best Sellers Rank | 770,513 in Automotive ( See Top 100 in Automotive ) 935 in Motocross Helmets |
| Customer reviews | 4.6 4.6 out of 5 stars (2,415) |
| Date First Available | 12 Aug. 2012 |
| Department | Unisex |
| Item Weight | 10.5 kg |
| Item model number | 81771 |
| Manufacturer | O'NEAL |
S**P
Helmet
Very comfortable and good quality Bit noisy so I sealed the air intakes on the top and is now much better I would recommend
S**N
Super
Really is worth the money. Nice chuncky and a snugg fit plus 2 visors. Makes me feel like a bobble head, but safety first.
S**H
Excellent
Nice snug fit, good value for the money/comfortable. Chin cover keeps falling out though, that's the only problem with it. 4 stars instead of 5.
A**R
Good value lid
Excellent helmet, exactly what I was looking for. Light, comfortable, pinlock and sun visor. Arrived quickly and well packaged.
B**D
Excellent
Very high quality
D**N
Happy with my purchase
A visor, shield, sun shield and adjustable ventilation are good requirements a helmet should have when you ride an EUC. This helmet has it all and I am happy with my purchase several months of usage during cold season. It may be too hot for summer but that remains to be seen.
V**E
Excellent qui
It was a Christmas present
A**E
Great lid
This helmet s the dog’s bollocks :-)
A**O
Design bello e abbastanza rifinito, il casco é peso ma il rapporto qualitá prezzo molto buono.
D**K
A good helmet for the price that I recommend to buy. It is a little noisy on highway, better remove the visor if you are in warm climate and use the goggle. Large fits perfectly and very comfortable with no stress. No headache or fatigue after 9 hrs ride over the mountains and no issue with breathing but will fog the visor. Don't think twice. Just buy it! I am writing this review because the helmet saved my melon in the accident with 50mph (80kmh). All I had in my mind at last moment was (I am dead) and just squeezed the brakes. I felt my forks bottomed and impact then felt impact on my head. When I woke up "Please take my helmet off. I can't breath" and I was in /out of conscious. Helmet was two weeks old but looks like been through many wars. Two punctured holes and all the marks reminded me of the impact that would easily busted my melon all over the pacement. Got both legs fractured and right wrist as well but survived. I was riding 1996 Yamaha WR200R heading to Lashio (Myanmar) from China.
A**.
Muy mala calidad, llego con el protector de la nariz doblado. No es lo que parece en las fotos. Devuelto.
J**N
Muy confortable, se ajusta muy bien, gran vision, el protector anti baho funcio estupendamente, muy bonito , con una relacion calidad precio estupenda. Estoy muy contento con la compra, totalmente recomendable
P**.
Good product in quality and worth the pricing. Light weight. Availed one higher size and it’s a perfect fit. Good & timely delivery by Amazon.
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