A must-have for trekking is ExOfficio's Nio Amphi Convertible Pants--are they pants or shorts? They're both! These convertible pants come with a built-in removable belt and Indestructible Button System. UPF 50+ Sun Guard repels harmful rays, and the Durable Water Repellent-treated nylon fabric dries faster to keep you comfortable. The pants have a full inseam gusset that lets the Nio Amphi move with you, and multiple security zip pockets keep items safe.