This back bracket. It has good air permeability and moisture absorption, and can keep dry and comfortable during exercise. Suitable for use in fitness or yoga routine training or daily health care, will not make the user feel stuffy, and the material is soft, fits the body curve, will not cause too much friction to the skin. Material: Polyester fiber: Weight: 0.57lb(260g) Dimensions: 38.2x7.9inches (97 x 20cm(L)) Dimensions: 41.3x7.9inches (105 x 20cm(XL))Wide range of users: unisex, ideal for daily activities such as lifting weights, yoga, indoor and outdoor fitness, bending, sitting, standing or walking for long periods of time, yard work, housework, driving, etc. Skin friendly and comfortable to wear: The product is made of technology gauze material that can ensure the maximum comfort when wearing for a long time, breathable mesh, double binding, so that the support strip is more fit to the waist, balance the force on the waist, better support, will not chafe or irritate the skin. It is comfortable and easy to wear under any clothing. Back pain relief: Can relieve disc herniation, sciatica, strain, sprain, muscle spasms, or other back pain. Comfortable support can help relieve your back from walking or sitting all day! Wear a waist support strap to support and stabilize your lower back and help maintain a normal posture. Back X Protection design: This back support for low back pain features an X-bone support system with a reference to human skeletal engineering, 5 internal back memory support plates, external X-spine support and 2 sets of transverse band traction to provide excellent firm support for your spine without stiffness. Back Protection Belt: Professional support belt provides excellent lower back support and relief. Allows full range of motion while providing comfortable support. It helps to stabilize the spine, lumbar spine, reduce muscle impact, reduce motion vibration, and provide optional protection during participation in activities and sports.