O'Neal Sierra II Helmet features:
- Shell is constructed with ABS
- Weight: 1590g (±50g)
- Moisture-wicking, removable/washable air channeled comfort liner
- Vent holes for optimal ventilation
- Integrated face shield with UV protection
- Height adjustable helmet shield
- Padded Chin Strap with Double-D safety lock
- Meets DOT and ECE 22.05 safety standards
- Designed for Street, Enduro and Adventure Bikes
Oneal - Sierra 2 Adventure Matt Solid Helmet
