Here's what other sites are saying:
The ultralight Edelrid® Shield helmet offers excellent protection and comfort for both climbing and cycling use—great for adventure racing. Made of shelled polystyrene foam; amply vented sides for good airflow, so you keep a cool head. Headband adjusts instantly via the nape-mounted, Disc system dial, easily operated with one hand, gloved or bare. Headlamp strap retainers keep your light secure on early alpine ascents and late descents. Nylon webbing chinstrap can be adjusted with the helmet on or off. Meets all UIAA and CE specifications for shock and energy absorption, conical impact, security of retention straps and ventilation standards.