Double pressure bandage, lock waist and abdomen, reduce lumbar compression, relieve lumbar fatigue; two curved memory plates, self-adaptive lumbar curve, support lumbar force, reduce lumbar pressure; four support plates are fixed, surround and fit on both sides of the steel plate to show a trapezoidal support structure, large support area, relieve pain, the back can fully and effectively wrap the support, assist the waist force Waist slippery buckle design, can freely adjust the tightness according to the waist circumference, comfortable, breathable, light and thin, can be worn in four seasons