The Stearns Underwaderwear Sleeveless John Thermal Underwear sleeveless design prevents binding and pulling through the shoulders while wearing our wader suit. Our wader suit was designed to provide both exceptional comfort and great warmth. Made of 4-way super stretch non-pilling double-brushed polyester fleece that provides excellent thermal comfort by trapping heat inside and wicking moisture away from the body to help keep you warm and dry. Full-length nylon self-repairing zipper. Elastic pant cuffs with elastic stirrups.