90% Cottin/10% Polyester Imported Button closure Machine Wash 【Soft Cotton Fabric】90% Cotton, 10% Polyester. Comfortable and breathable,ease care dress shirts with a clean look, keeps your body dry and comfortable all day. 【Muscle Fit Design】If you have a good figure, this mens slim fit dress shirt will show off your muscles and make you look stronger. 【Care Instructions】Machine wash cold setting keeps colors vibrant and ensures long-lasting durability. Please wash it with similar colors. 【Occasions】You can pair this long sleeve button down shirts with chinos/jeans for casual daily wear, or match the muscle shirt with dress pants for classy look. This smart shirt is essential in mens wardrobe and greats for all season, Suitable for office, business, date, night out, club, travel and casual daily wear. 【Size】This slim-fit muscle shirt will be smaller than a normal size, so go one size larger if you want a looser feel.