A versatile layer built for variable weather. unpredictable, Simms' Rogue Fleece Vest for men helps you maintain your core temperature. The water-resistant vest is designed with a woven polyester face, with a plush fleece back for cozy comfort. Fleece-backed hand-warmer pockets thaw frozen hands, and a zip chest pocket is roomy enough to hold a fly box. Features Water‐resistant & UPF 50 1 zippered fly‐box compatible chest pocket with cordport 2 fleece‐backed hand‐warmer pockets Rib‐knit at hem YKK Vislon center‐front zipperTech 100% polyester face & fleece back. All Simms outerwear features nylon YKK zippers to minimize corrosion and provide high performing, durable wear. UPF stands for Ultraviolet Protection Factor and indicates how much of the sun's UV radiation is absorbed. A fabric with a rating of 50 will allow only 1/50th of the sun's UV rays to pass through. This means the fabric will reduce your skin's UV radiation exposure significantly. All of our UPF finishes last the life of the garment, an industry standard of 30 washings.