therma-fit comfort. the nike chain fleece men's training trousers feature warm therma-fit fabric for insulated comfort with a soft feel against the skin. bonded pockets offer secure storage, and a vented hem fits over shoes easily.. benefits. therma-fit fabric to help keep you warm and insulated. elastic waist with interior drawcord for a snug, adjustable fit. brushed interior for a soft feel against the skin. laminated zip pockets for secure storage. vented hem with zip for versatility and easy on and off. inset side panels for mobility. product details. fabric: therma-fit 100% polyester. machine wash.