Noble Mount Mens Waffle Knit Thermal Union Suit 100% Cotton Cotton rich blend. Superior fit and feel Sturdy rib cuffs provides stretch Soft, comfortable, warm Heavier construction adds durability and warmth Wear it as underwear or as sleepwear 60% cotton/40% polyester composition Cotton-rich blend ensures maximum comfort and durability Classic waffle weave traps and retains body heat Rated for cold weather use Comfortable enough to wear as underwear or as sleepwear. Ribbed crewneck and cuffs and ankles to protect againt draft One piece long underwear with full button placket Full cut for comfortable fit Functional rear flap