Trek Solstice Mips Youth Bike Helmet Black/Dark Aquatic (50 - 55 cm): A fun, comfortable kids' helmet that looks great and features the added protection of Mips. A head start to happier rides Trek Solstice Mips is a super comfortable, stylish and easy-to-adjust helmet that's perfectly at home on track and tarmac alike. It's the ideal choice for kids who like to explore everywhere. This helmet also features a Mips safety system, which is a helmet technology designed to help protect riders from rotational forces that occur during some cycling-related accidents. Product details Mips safety system Fun, kid-friendly looks with a removable visor Large vents and recessed channelling help kids keep a cool head The Trek Headmaster 3 fit system provides simple and secure adjustability with just one hand Soft, comfortable helmet pads wick moisture and are easy to clean Crash Replacement Guarantee provides free helmet replacement if involved in a crash within the first year of ownership The 30-Day Unconditional Guarantee allows you to return your helmet if you're unsatisfied for any reason Virginia Tech 5-STAR safety rating Size Youth Circumference 50-55 cm Fit system Headmaster 3 Pad material Moisture wicking pads Buckle type Standard buckle Includes Crash Replacement Guarantee Weight 305g