High performance Zirotek fabric (92% polyester/8% spandex) mimics polar bear fur by trapping air with small filaments in the fleece lining and returning the heat to your body * Reflective ankle zippers and hidden internal pocket (perfect for storing your wallet, keys, or iPod) * Men"s Sizes: S (28-30 in. waist) M (32-34 in. waist) L (36 in. waist) XL (38-40 in. waist) 2X (42-44 in. waist) 3X (46-48 in. waist) 4X (50-52 in. waist) *NOTE: Fits 30-34 in. inseam * Perfect for cycling, jogging, hiking, and any outdoor cold weather activities * Made in the USA