THE MOST SKIN-FRIENDLY FABRIC: The undershirts are made of 95% bamboo rayon and 5% spandex. Stretchy, high-quality fabric, with flated lines, keeps you odor-free feeling and smelling fresh. Highly sweat absorbent and moisture-wicking - keeps you dry TOUCH FEELING OF FANTASTIC UNDERSHIRTS: Undershirts for men feel almost silky smooth. Incredibly soft feel great against your skin and is very light. Feels cool and breathable against your skin, slightly slimming effect PERFECTLY SLIM-FIT AND TAGLESS: Nice fit, super soft and hides well beneath a dress shirt. they are tight without feeling tight and makes these perfect under other shirts or on their own. Tight-fitting but very comfortable in both warm and cold weather WEAR UNDER ANY CLOTHES: Invisible under all your clothes, such as suits, formal dress shirts, workout shirts, t-shirts, polos and sweaters. Wear it anytime, anywhere. This Crew Neck T-shirt is the best choice for anyone, it's perfect gift to the men INSTRUCTIONS: 3-Pack and 5-Pack as you choose. It is very easy for you to keep it. Tumble dry, and if you wear it for a few hours the wrinkles disappear. They do not shrink or lose their softness after being washed