You'll sweat plenty, but for the Lightweight Packable Tennis Cap from Wilson, the game is a breeze. Crafted from lightweight, single-ply polyester twill with a five-panel crown, this cap has a pliable, pre-curved brim and allover perforations for maximum ventilation. An interior mesh headband keeps sweat out of your eyes, and the bungee cord with a stopper cinches for the perfect fit.