Columbia Sportswear Backcast II Water Short - Technical shorts developed and designed especially for anglers. Functional features keep you reeling in fish all day long. UPF 50. Ultraviolet Protection Factor (UPF) is a measure of the percentage of ultraviolet sunlight that reaches your skin. Omni-Shade clothing protects you by blocking harmful sun exposure. Your safety increases with the UPF. Features include: 100% textured nylon poplin, Belt loops, Plier pocket, and Omni-Shade UPF50.Swim or boat in light, quick-drying Columbia Backcast River Shorts. Light as air, dry in a flash. They're the most comfortable, easy-care ""swim trunks"" ever! All-nylon Perfecta Plus shell; polyester mesh brief interior. 2 wide-entry, partially mesh-lined pockets; Elastic waist with interior draw cord, belt loops; Pack into rear zip-close, mesh-lined pocket; Right rear utility pocket; Inseam approx. 6 1/2"". State Color and Size. Columbia Backcast River Shorts.