- Lightweight Inmold Technology fuses the inner EPS and shell together: more durable and ventilated plus increased protection and energy dispersion - Multiple air vents for optimal ventilation and cooling - Quick release buckle for easy single-handed fastening and release - Incorporating IPX® ACells helmet rotational impact absorption technology optional available - Retention system for perfect individual fit and easy one-hand adjustment - Two shell sizes for optimized fit - Exceeds EN1078 and CPSC safety standard for bicycle Helmets - Weight 300-350g black/white L/XL nan Outer Shell: 55% EPS, 21% Polycarbonate, 21% Polyamide, 3% ABS; Padding: 100% PU-Foam; Liner: 100% Polyester nan