PREMIUM PROTECTION: Hard and fully formed ABS surrounds high quality EPS foam to absorb shock and keep you riding safely in this Retrospec helmet as you ride on your bicycles, skateboards, roller skates and scooters. Fully formed ABS surrounds high quality EPS foam to ensure safety. | VENTILATION: The classic skate design helmet with 10 vents to keep you cool and comfortable for a casual ride or a long day on your board. Dewcollector interior padding technology wicks away sweat, stench, and bacteria, keeping you dry and irritation-free. | SIZING: To determine the correct helmet size, wrap a measuring tape around your head. The tape should rest just above your ears and remain level around the circumference of your head. Small: 51-55 cm, Medium: 55-59 cm, Large: 59-63 cm | ADJUSTABLE FIT: Size in crucial for maximum protection. We included two sets of interchangeable pads so you can get the perfect snug fit. The adjustable straps can be tightened or loosened for a customized fit and feel. no-chafing chin pad | BRIGHT COLORS: Pick from a variety of matte colors to perfectly accent your bike and augment your personality and this helmet is recommended for riders who are age 14+.