The Hanes Ultimate Men's X-Temp Sport Crewneck Undershirt is made with soft and durable cotton for all day comfort. X-Temp technology designed to adapt to your temperature so you start cool, keep cool. FreshIQ advanced odor protection technology attacks the odor-causing bacteria in your clothing that causes your underwear and socks to smell-so you can feel fresh all day. Cool Comfort wicking fabric keeps you cool for all day comfort. Tag-free for itch-free comfort. Fabric: 100% cotton. Imported. Machine wash.