Guaranteed Fit: one size fits all Finch KinetiCore Uni-Youth 50 - 57 cm Helmet in Wisteria Safe Bike Gear Lazer Lupo KinetiCore Helmet, Uni-Adult - Primo Cycles Lazer Kineticore Helmets Lightweight: 19% lighter than Lazer Compact DLX MIPS M CE Reduced plastics: 70g less plastics used than in Lazer Compact DLX MIPS M CE Size: Uni-size 54-61 cm Rated 4/5 stars by Virginia Tech* *Since 2011 Virginia Tech have been providing unbiased helmet ratings that allow consumers to make informed decisions when purchasing helmets Easily Adjustable: TurnSys system provides a secure fit instantly Lazer Codax KinetiCore Helmet Adult Bike Helmet: the Codax KinetiCore is a sporty all-around cycling helmet