The Oz-zy is one of Garneau's most popular models and now it's you can choose from unique colors you'll only find here. Oz-zy features 16 generous vents stylishly carved into a bonded microshell and a superb fit is assured with the spider lock 2 retention system. Air dry fusion pads and an ergonomically designed chin buckle make this one comfortable helmet. Weight 270 g Sizes: Small (52-56cm/ 20.5-22") Medium (56-59cm/ 22-23.25") Large (59-62cm/ 23.25-24.5")