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The On Zero Cap is the race cap that wicks sweat and weighs practically nothing. Lightweight and adaptable, performance engineering and weightless comfort ensure this sweat-wicking race cap won't slow you down. Constructed in recycled polyester, it wicks away sweat to keep you dry from start to finish, with a weightless, barely-there feel. The easy-flip brim keeps the sun out or lets the light in when visibility is low, so you're always ready to run. Basically – it's everything you need in a running cap.