Dynamic Lumbar support w/ Magnetic Fastener is designed to provide mild support to the lumbar. The magnetic fastener is innovative technique and durable. It provides quick application. There are 3 adjustable size options at front panel for proper tightness. 4 stays and side-pulls also give additional support. Elastic side-pulls with injection pullers design is easy for user to wear this back support. This material features comfortable fit and good stretch.