The original Pepper in the Hot Chillys Peppers Collection, Pepper Skins are your standard, dependable thermals. Originally designed with the working professional in mind as a warm baselayer, this fabric features our staple MTF polyester fibers, which work to transport moisture away from the skin as you go about your day. Pepper Skins feature a flat seam construction for seam strength, durability, and longevity, front fly, and a relaxed fit for everyday comfortable use.