The original three-season jacket, often imitated but never equaled, the Mountaineer features a shell constructed of windproof/water resistant polyurethane-coated heavyweight Toughlan® nylon, and is lined with super heavyweight 11.5 oz. Anti-Pilling PANDA FLEECE. Also features two front pockets with zippers and one inner right chest pocket with zipper. Double-stitched seams for added strength. Raglan sleeves and stretch cuffs and waistband. Temperature Rating – Warmest: 5º to 50º Fahrenheit.