Urban-style helmet with Multi-directional Impact Protection System (MIPS) technology that reduces rotational forces during impact Vented ABS shell with subtle brim, and lightweight Conehead EPS liner offers excellent airflow and maximum protection; ideal for biking, skateboarding, rollerblading, BMX, derby, and commuting 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, adjustable dial system, and chin strap with side release buckle for custom fit 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); manufacturer’s 180-day warranty