Injection moulded ABS shell - Expanded Polystyrene (EPS) protective inner foam for high impact protection - 2 front intakes - 7 multiple top-mounted exhaust vents, and 2 rear exhaust vents - Adjustable Spin Dial allows perfect fit - 3 sets of removable foam inserts for comfort and refined fit - Anti-Pinch, Magnetic buckle for easy one handed operation - relective logo's front, back and sides - Certified CPSC for bicycle riding - excellent quality product.