Polylite Shell construction with fiber reinforcement. Dual Density EPS co-molded with EPP combine to safely manage high and low-speed impact. Polyacrylite injected chinbar with EXO skeleton reinforcement. 11 High Flow air intakes and 14 Open Core exhaust ports with deep max air flow internal channeling. FIDLOCK magnetic buckle system. MIPS. X-static pure silver comfort liner delivers high performance odor protection and quick-dry moisture wicking. JAWPAD / lo-profile cheekpads use Xstatic fabric and super soft interior surface for maximum comfort and breathability. Integrated anodized aluminum and plastic breakaway hardware. Wide range and adjustable visor +- 40mm. EPP lined chinbar for multi impact performance. Anodized aluminum rivet washer. Drawstring bag with breathable mesh paneling. Eceeds certifications: CPSC 1203, CE EN1078, ASTM F1952, ASTM F2032, and AS/NZS 2063-2008. 690 grams (1.5 lbs) size M/L. 3 Year Limited Manufacturerâs Warranty. In the Box: Helmet Sock, 10mm Headliner, 13mm Headliner, 15mm Check Pads, 25mm Check Pads, 35mm Check Pads, 15mm Neck Roll, 25mm Neck Roll. Sizing Chart– Hat: X-Small / Small: 6 3/4 â 7, Medium / Large: 7 1/8 – 7 3/8, Large / X-Large: 7 1/2 – 7 7/8; Centimeters: X-Small / Small: 54 – 56 centimeters, Medium / Large: 57 – 59 centimeters, Large / X-Large: 60 – 62 centimeters; Inches: X-Small / Small: 21 3/8 – 22 inches, Medium / Large: 22 3/8 – 23 1/4 inches, Large / X-Large: 23 5/8 – 24 3/8 inches.