Combining Smith's advanced hybrid shell construction with the pinnacle protection of lightweight, ventilated Aerocore technology, the Level helmet offers best-in-class performance and style. By utilising Smith's adjustable VaporFit fit system for an ideal fit, the Level provides complete comfort to help you carve up the big lines that inspire the sleek, sweeping design language of this compact, high performance helmet. PROTECTION : Hybrid Shell construction; Aerocore construction featuring Koroyd; Low-profile adjustable climate control; 20 vents; MIPS system available. FIT : VaporFit adjustable fit system; XT2 anti-bacterial performance lining; Snapfit SL2 Ear pads INTEGRATION : AirEvac ventilation; Audio compatible Ear Pads SIZE : Small 51-55cm Medium 55-59cm Large 59-63cm X LArge 63-67cm CERTIFICATION : ASTM F 2040, CE EN 1077:2007 Class B WEIGHT 18oz/500g