Inspired by boundary-pushers and style-defining pioneers. The Tempestas Sum hat packs in function and fashion into one, high-performing piece. A deconstructed, five-panel cap, it's made of lightweight, moisture-wicking nylon to keep you cool and dry and features UPF 40+ to help protect you from harmful rays. Plus, it features a flexible brim for a personalized look and a snapback closure for all-day comfort. Technical. Progressive. The hat to top off any ‘fit.