Demon Podium Full Face Mountain Bike Helmet Black with White Supra Goggle EPS foam liner conforms to your shape for superior fit. Removable, washable helmet liner. Tough injection molded thermal alloy resin polycarbonate shell with 13 convenient air flow vents. CPSC certified. Helmet weighs 2lbs. 2oz. Measure your head circumference for proper size- XS 49-53cm, SM 54-55cm, MED 56-57cm, LRG 58-59cm, XL 60-61cm