SPECS: Weight (Size M): 23 oz / 650 g 22 vents DESIGN & TECHNOLOGY: Hybrid shell that adds durability Koroyd(R) - a fully-vented material that absorbs more energy in a crash than traditional foam MIPS(R) Brain Protection System for increased safety during angled impacts Aadded comfort level that micro-adjusts around your whole head Sweat-wicking, odor-fighting liner keeps you warm Easily adjustable 22-vent design that can adjust airflow as needed Aerocore(TM) construction for lightweight, energy-absorbing and ventilated impact protection Exoskeleton enhances impact protection in side impact zones BOA(R) 36 Fit System gives most adjustable fit with turn of a dial Fidlock(R) strap buckle offers easy one-hand operation AirEvac(TM) ventilation system integrates with Smith goggles for fog-free lenses Removable ear pads for form-fitting comfort Available in Round Contour Fit to better match rounder head shapes Antimicrobial lining fights odors Outdoor Tech(TM) audio system compatible