The STEALTH AIR™ acts as an immobilizing device for the lower back and its primary function is to reduce pain and provide support and immobilization to the lumbar-sacral spine. Why did we name this brace Stealth Air? Depending on which sized brace the weight ranges from 9.9 oz. to 13.7 oz. making this the lightest brace Optec makes. Made with semi-rigid fabric, its structure is made with four self-molding and flexible plastic stays over which the strapping system operates. The STEALTH AIR™ perfectly adapts to many sizes and body types, thus ensuring maximum support and comfort. What makes this brace so much different than our current Stealth line? Not only the sizing and new breathable fabric but also we have made modifications to the compression system which is tear resistant! Through a new locking technology, operated by means of two crossing bands, the closure system is user friendly and allows a wide range of tension settings. Its not a gimmick, the strapping system in the back along with the arthritic grips are designed to withstand an incredible amount of force. No longer will you have inventory issues! The Stealth Air is our most revolutionary back brace and is only three sizes fits all, which means more savings for you!