1This product uses heatabsorbing polymer materials to increase your natural body temperature and stimulate sweating through any type of physical activity, and help lose fat. 2The arm sleeve is elastic and can compress the excess fat, making your arms look more slender. 3Soft and skinfriendly, even if you wear it for a long time, you will not feel uncomfortable. 4It can help shape your body figure when working out in the gym, yoga, aerobics, cycling or just running. 5The outer layer is highperformance compressed fabric with good air permeability, practical for use.