Moxi Roller Skates has come together with Triple8 to bring you top-of-the-line protection with personal style in mind! This is the first and only helmet to fully integrate the best of high impact absorbing EPS Foam with thick dual density soft foam and plush Sweatsaver fabric, delivering the ultimate in comfort with dual certified protection- to bring you both safety and confidence as you roll through life! 2 sets of Sweatsaver liners to customize the fit.To ensure a perfect fit, measure the circumference of your head starting in the middle of your forehead and match it with the sizing chart above. Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older and ASTM F-1492 Skate safety standards.