Heat control mens short sleeve t shirt get cosy in this heat control mens short sleeve t shirt crafted to keep the body naturally warm through its super thermal extra thick fleece fabric trapping heat and holding it close to the skin this thermal top has a tog rating of 045 and is super lightweight mens thermal t shirt short sleeves extra thick fleece traps heat and holds it close to the skin tog rating of 045 lightweight 50 polyester 50 cotton machine wash