Cotton Thermal Quilted Underpants with Reinforcements - 1 Pair Size: LL / Waist 94-104 cm Color: Off-White Quality: 100% Cotton / Filling: 100% Polyester Features and Functions: Far Infrared Quilting Reinforcements / Waist and Knees These underpants are designed for warmth and heat retention. The part that touches the skin is 100% cotton, so it's soft and gentle on the skin.