100% CottonCountry as Labeled1. Material: This ion shaping tank top is made of stretchy and breathable fabric, soft and comfortable. By wearing it continuously, you can maintain a better body shape.2. Ion Shape Vest: Using advanced compression technology to shape muscle lines, it can effectively help you lose overall weight, reduce the accumulation of fatty tissue in the chest, and shape perfect chest and abdominal muscles.3. Dry Comfortable: Men's cool tank tops are extremely breathable, greatly reducing sweat production. The men's shaped sweatshirt wicks away moisture to keep you dry and comfortable during the most intense workouts.4. Promotes Muscle Shaping: The ionic shaping tank top is designed to retain body heat and promote chest perspiration. Makes the chest look more manly.5. EASY TO MATCH: Shaping tank tops can be easily and perfectly paired with t-shirts, sweatshirts and work clothes. Our chest compression tank tops can be worn comfortably under any style of shirt. A great gift for boyfriends, husbands, and friends.