Optimo Life -Double Pull Lumbar Lower Back Support Brace- Multipurpose: L (34-38''/86-96cm) Criss-cross heavy duty elasticated double pull mechanism for adjustable compression Supports along the spine to provide stability for those suffering from lower back pain By keeping the lower back in an upright or extended position, it reduces the strain placed on the pain producing structures of the lower back such as muscles, ligaments, discs and nerve roots. Non-stretch fabric across the back panel which is designed to provide extra support for the lower back This support provides warmth, support, flexibility and compression to the lower back.