Back brace contains 4 Memory-aluminum stays that are quadruple harder than the commonly used PP strips and 2 steel springs placed along the waist side. So, it can offer 360 stronger vertical support to the lower back, prevent excessive rolling of your muscles and decrease the pressure on your discs. Breathable Comfortable Fabric The back support made of 4-way stretch elastic material 3D knitting technology by different compression levels, for superior fit, breath and comfort. The inner layer is made of velvet fabric, giving an ultimate baby-skin-like silky touch,perfect for dressing internally. Extra Compression Band Back support with 2 elastic straps are designed to add extra compression around lower back to prevent back injuries from weight lifting, long time standing or sitting, doing housework, working, etc. Relief waist muscles ache, disc herniation, sciatica, scoliosis etc when wearing the back belt.