The Triple 8 Gotham Dual Certified Skateboard and Bike Helmet is the perfect blend of comfort, safety, and good looks. Dual-certified for both bike and skate, and its innovative Conehead EPS liner offers additional protection with collapsing cones that act like a crumple zone to absorb the energy from a crash and spread the force sideways within the helmet liner. An ABS shell, with an urban profile and subtle brim, features Triple Eight logo vents for maximum airflow. Ideal for biking, skateboarding, rollerblading, roller derby, and commuting, the helmet complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older and ASTM F-1492 Skate safety standards. Includes two sets of removable, washable terrycloth Sweatsaver Fit Pads, an adjustable dial system, and chin strap with side release buckle for customizing the fit. Available in three sizes: Size XS/S fits 18.9 – 21.3 in (48– 54 cm), S/M fits 21.7 – 22.8 in (55 – 58 cm), L/XL 23.2 – 24 in (59 – 61 cm). To determine proper size, measure using a soft measuring tape or string.