To top it all off, our fabric is made out of viscose and elastane. With these materials, our gym tops stay durable, stretchy, and machine-washable. When it comes to intense physical activities, your body heavily relies on blood circulation in order to keep your muscles fueled and ready to go. Born Tough’s extensive variety of workout shirts help the human body do just that. Our workout shirts’ fabric helps the body transport blood and oxygen more efficiently, which ultimately leads to a much more effective workout. All of us here at Born Tough realize that heat regulation is an absolute necessity, which is exactly why our best workout shirts are specifically designed to keep the upper body at a relatively cool temperature and absorb overall perspiration. From sleeveless to compression, our workout shirts are readily available for all shapes and sizes and also come in a wide array of colors, our most popular sellers are black, green, stone, gray, lunar rock, pink and blue.