NIKE Men's Therma-FIT Hyperspeed Fleece Training Pants, Black Imported Therma-FIT fabric to help keep you warm and insulated Stretch waist with drawcord for a snug adjustable fit Panels at sides inseam and lower back legs for wide range of motion Side slit pockets for storageRib cuffs for durability and enhanced fit Fabric : Therma-FIT 100% polyester