You can't. Vonmie plastic belt is a product designed to help shape waist line and improve waist health. Mainly used for plastic waist. Waist and leg sizes vary. This product is designed according to the waist, so vonmie plastic belt can't be tied to the thigh. Vonmie plastic belt function: it can strengthen the tightening of abdominal muscles and lumbar muscles, effectively alleviate the problems such as lumbar disc herniation and lumbar muscle strain, and can also promote fat burning by strengthening blood circulation in the back and waist, thus playing a role in body shaping.