Bern Unlimited Bandita EPS Summer Helmet 20 1/4 - 21 1/2 in Thinshell EPS foam with ABS outer shell gives a durable and long lasting, low profile fit Hard Visor design is well ventilated for a total package of safety, comfort and style Meets Safety Certification ASTM F 2040, CPSC and EN 1078 and WINTER UPGRADE KIT AVAILABLE SEPARATELY