Steam rolling the market this winter is the all new Rollins. Utilizing Bern’s tried & true Zipmold Technology this helmet has a tapered, thinner, low profile fit that is lighter weight with a higher strength to weight ratio than in-mold helmets. Throw that into a sleek new styling with hidden internal adjustable vent sliders that have a set & forget functionality for as little or as much ventilation as you need. Add a wireless audio ready knit with the all new premium micro adjustable fit liner for customizable fit & comfort, plus a helmet carrying bag... what more could you need? Specifications Weight: 16.9oz Standards: Zipmold® hard foam meets ASTM F 2040, CPSC and EN 1078 standards for bike & skate. Sizing Chart: Summer Winter Technology Bern’s exclusive Zipmold® foam is a liquid foam injection process that provides a better weight to strength ratio so Bern can provide customers with a lighter, lower profile helmet.