1Breathable fabric: Made of mesh nylon fabric, comfortable skin-friendly, breathable and not stuffy. 2_x000D_Steel bar: Built-in 5 heel steel bars, provide enough support for the waist, anti-C design, better fit the waist, and you will not feel uncomfortable. 3_x000D_Fixed structure: Two-way tension fixation, uniform load on the waist, relieve waist fatigue, use V-shaped elastic band to give sufficient pressure to the waist, protect the waist in all directions. 4_x000D_Adjustable: Fixed with hook and loop fastener, easy to operate and easy to disassemble. 5_x000D_Full protection: Support waist and keep warm, protect the waist in all directions, assist the lumbar muscles, relieve lumbar discomfort, and are suitable for people with back pain and long-term sedentary.