These are warm long underwear from Angle's Air Merry, a high-quality thermal underwear brand. 100% cotton. Size: L Air Merry's double-layered fabric traps warm air heated by your body, providing comfortable warmth. It's lightweight, fits well, and has excellent moisture absorption. Although new and unused, this is a SC item (B-grade) and has been stored at home. As far as I can see, there are no stains, tears, or scratches that would interfere with use. Please understand this before purchasing.