Features: Relieve Lower Back Pain: Back brace contains 4 stays strips, and double layer auxiliary-pressurized boosters belt along the waist side, offer 360 degree support to lower back. Well Wear Under Clothes: The back support made of 4-way stretch elastic material，3D knitting technology by different compression level, for superior fit,breath and comfort. Prevent Back Injuries: Back support with 2 elastic straps are designed to add additional compression around lower back to prevent back injuries. Relief waist muscles ache, wearing the back belt. Considerate Detail Design: Anti-skid lining are designed insides of the waist, prevent bending. Wide size elastic straps provides strong adhesion far exceed your expectation. Durable & Satisfied Service: The waist support adopts double seams, the quality is strictly controlled, and it is very durable. If you have any questions, please feel free to contact us. Specifications: Material: Polyester Color: Black/Gray Size Options: S/M/L Size:S Stretch Length:90-100cm(35.43-39.37inch) Waist:70-85cm(27.56-33.46inch) Size:M Stretch Length:105-120cm(41.34-47.24inch) Waist:85-105cm(33.46-41.34inch) Size:L Stretch Length:120-140cm(47.24-55.12inch) Waist:105-125cm(41.34-49.21inch) Package Includes: 1Pc x Back Brace note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks!