Two additional straps provide compression and enhance proper fit. Fits snugly to the body contours and can be worn under any clothing. One broad & four narrow plastic splints gives perfect spine support by snagging to the bend of the back region. Four alluminum maleable metal splints are removable & can be given the desired contour to support the specific vertebrae. It’s use for chronic low back pain. Post operative rehabilitation of the Lumbo Sacral region. Osteoporotic pain of Lumbo Sacral region. Degenerative Lumbar Disc disease.