Suitable for: 1. People who has health problem like protrusion of lumbar vertebral disc， sciatica and/or lumbar hyperosteogeny.2. People who always work sedentarily or in a prolonged standing position such as drivers or office workers.3. People who want to contract abdomen slender waist or keep a toned body.Specification:Material: Mesh fabric， fishline cloth， metal staysFunction: Posture back brace relieve back painColor: BlackSize: S， M， L， XLS size fit for the waist between 1.9-2.3 feetM size fit for the waist between 2.3-2.6 feetL size fit for the waist between 2.6-3.0 feetXL size fit for the waist between 3.0-3.2 feetHelps relieve lower back pain by reducing strain. ?Unisex Product?Fully adjustable vented and breathable elastic side panels. ?Adjustable support with neoprene back panel for warmth and compression. ?Four stays for extra support. ?Easy application. ?Our most popular back supportBelow crowd please use it cautiously:1. Pregnant women and children please do not use this product.2. Please stop using if you have a high fever or damaged skin.3. Patients with acute soft tissue impairment， please don't use.4. Please use with caution under the guidance of doctors: Patients with serious trauma， high blood pressure or any other disease.Package includes:1 x Magnetic Back Support Lumbar Brace Belt