* Outer Shell - Polypropylene High - Impact Resistant outer shell. * Inner Shell - Moulded Foam reinforced with Shock - Absorbent sponge foam supports. * Inner Liner - Vents for free flow Air-Circulation and Sweat - Absorbent fabric to keep head dry. * Face Grille - Adjustable hardened powder-coated steel- wire face guard grill with mou...