On Zero Cap BlackConceived as a race hat, On presents its Zero Cap as an extremely breathable and lightweight model. It wicks away sweat to keep you dry from start to finish, with a weightless, barely-there feel. 81% Polyester, 19% Elastane Side Panels: 100% Recycled Polyester Flat Brim Adjustable Closure at Back Logo Printed at Front Style Code: 333.00963 001. Colour: black