Anatomical & pre contoured rigid shape provides effective immobilzation & maintain correct posture. It helps in maintaining natural curve of lower back. Double pull mechanism ensures strong fastening and avoid belt slippage. Easy to use, highly comfortable, controlled & effective compression, light in weight, flexible sizing & long functional life. EXACT FIT - For perfect fit and more comfort we recommend user to strictly follow the size chart shown and measurement must be taken according to the instructions provided.