1There are 9 levels of strength to choose from, which can be adjusted according to your needs. 2Made of microfiber PU leather material, it is very soft and breathable, will not make your feet sweat. 3The removable design can make it more convenient for you to charge it. 4Longterm use of this product can make your legs slim and make your skin firmer. 5It can be used while resting, reading and working at home, which is very convenient.