The Lazer Nutz Youth MTB Helmet comes with modern styling and integrated brim along with Lazer's own patented Autofit system. Autofit system is an automatic fit system that delivers equal and constant tension by eliminating the need to manually adjust helmet retention: simply pull the helmet on, and the front and rear baskets of the helmet will adjust themselves to provide a great fit Lazer Nutz Youth MTB Helmet Features Autofit system is an automatic fit system that delivers equal and constant tension by eliminating the need to manually adjust helmet retention: simply pull the helmet on, and the front and rear baskets of the helmet will adjust themselves to provide a great fit In-mould (1-piece) construction 16 cooling vents Additional Crazy nut shellz can also be bought separately to quickly change the look of this helmet check out our full range of exciting colours and styles Weight: 280 g for a uni-size youth Size: Uni-Size Youth 50-55 cm