Product Description Material: Spandex + Neoprene Size: S/M: upper circumference 24 cm, lower circumference 22 cm, height 21 cm; L/XL: upper circumference 28 cm, lower circumference 26 cm, height 21 cm; XL/3XL: upper circumference 32 cm, bottom circumference 30 Cm, height 21 cm Color: black outside and silver inside, black outside and blue inside Quantity: 1 pair Package content: 2*sweat armband 1. Innovative compression sportswear: This armband uses a heat-absorbing polymer fabric to increase your natural body temperature and stimulate sweating through any sports activity. Wearing an arm band during exercise or daily activities can create a sauna-like thermal experience for your arms. Your body temperature will rise, so you sweat more. 2. Toned and lean arms: The triceps area is one of the most challenging muscle groups. The triceps stores excess fat, which is difficult to remove. This arm strap is designed to exercise your triceps and biceps muscles, increase sweating and help achieve the slim, strong and toned arm look that everyone will envy. 3. Fit contour design: The design of this arm strap is designed to provide a tight fit, because they surround your arm and are firmly fixed in place when you exercise to exercise your two heads. Muscles and triceps, and give them a perfect sporty appearance. 4. Comfort and versatility: The arm trimmer with this arm strap has been carefully designed, so it is very light and comfortable even when worn for a long time. Wear them, and after a few minutes, you will forget that you are wearing them. They will perfectly shape and move with your arms when exercising in the gym, yoga, aerobics, cycling or just running errands. You can easily wear them under ordinary clothes, and they will be completely invisible. 5. high-grade fabric: The blended fabric of this armband has been selected to create a compression armband. The blended fabric of this product consists of two layers: the internal heat-generating polymer fabric can increase your core temperature to promote sweating. The outer performance compression fabric can instantly slim and shape your biceps and triceps, compress your arms, and at the same time support and heat your muscles to improve blood circulation.