1Durable, double adjustable belt allows you customize the fitting degree. 2Used to protect your lower waist and lower back area, relieve pressure on muscles and joints, and help relieve lower back pain naturally. 3Focusing on both sides of the spine to improve comfort and flexibility is particularly appropriate for sciatica, scoliosis and herniated discs. 4Made of quality polyester material, comfortable to wear and use. 5There are 4 different sizes available, suitable for different body sizes.