GMAX GM11 D/S Solid Men's Motocross Motorcycle Helmet - Flat Black/Small Light weight, Thermo-plastic, Poly Alloy Shell. Adult size large weighs only 2.9lbs; Youth helmet weighs in at just 2.2lbs 4 total shell sizes; 3 adult and 1 youth keeps the weight down and gives a proportional, balanced fit for all riders Industry leading 19 vents. Maximum air flow is achieved through shell/styro and comfort liner vents DOT approved 2015 Model