Sierra II R Computer it has a softer tread

it has a softer tread compound that ensures better adhesion and performance on hard and rocky terrain or in wet

Waterproof membrane with polyurethane coating

This is essentially a layer of low-friction material which lies between the helmet shell and the interior

- Wider surface

Crank Pin Bearing

Sierra II R Computer it has a softer treadO'NEAL's longing for better equipment, tailored to the needs of the riders and the desire for higher performance were motives that led O'NEAL to found this company. Product development is a central aspect of the O'NEAL philosophy. This is exactly what the O'NEAL Sierra II Comb Motocross Helmet reflects. This helmet convinces through its design without sacrificing quality. Features: ABS outer shell matt finish long lasting, multi coloured graphics