O2 RD RACE.

Technology:
Fit System: Rollsys® Retention System
Construction: In-Mold (2 pieces)
Ventilation: 24 vents
Weight: 310g
Certification: CE
Sizes: Unisize, XL (61-64cm)

Features:
Rollsys® - Turn me on! Simply control the size and the comfort by turning the wheel on top of the helmet
Featherlight - Minimum weight
Coolmax® - Makes moisture disappear, dries quickly and is breathable
RBS - Rigidity Brace System:  Reinforcements for a superior helmet resistance against multiple impacts
Channeled Ventilation - Internal Ventilation channels for optimum airflow