The Hot Chillys Women's Pepper Skins Crewneck Top is knit like a T-shirt in single jersey with slight brushing for a soft, lived-in feel. Originally designed with the working professional in mind as a warm base layer, this fabric features Hot Chiilys staple MTF polyester fibers, which work to transport moisture away from the skin as you go about your day. Pepper Skins thermals feature a flat seam construction for seam strength, durability, and longevity and a relaxed fit for everyday comfortable use.