The original 'Pepper' in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. This youth thermal base layer has single jersey knit with slight brushing for a soft, lived-in feel. This thermal crewneck long sleeve shirt has MTF polyester fibers, which work to transport moisture away from the skin to keep you warm and dry. This crew neck thermal shirt has a relaxed fit for everyday comfortable use.