WHEN and WHY you need Yosoo 4 Stabilizer Back Support: - When you are suffering a back pain, needing to sit hours or lift things in your work time, liking playing , yoga and some other fitness activities, it is VERY important to wear this for a couple of hours to support your back and protect it from injury and pressures. - Compared with some other back support in the market, this brace is built in with ergonomic steel stabilizers instead of flexible springs. The firm steel stabilizers could provide a stronger support along the central and lower back and lumbar area. They keep lower back in an upright or extended position and reduce the strain on pain producing from muscles, ligaments of the lower back. Detailed Features of this Lower Back and Lumbar Support: - Wide Lumbar Support Area: it has 9 inches wide area in the back, and 5.5 inches in front. It could cover lumbar 1-5 for a standard 165cm body. And the front strap would not weak the stomach muscles when you bend for lifting things. - Currently our L size is for the max 44" belly(just remember to measure your belly size, not waist size) and it works for both men and women. - Based on some female customers' feedback, we add a heating pack(not included) mesh bag on the front abdomen strap. It is around 9.5" x 4"(S M Size) 12.5" x 4"(L Size), and could hold the heating pack for hot during that time of the month. - Hand-washable, just wash it with warm waters and air dry. If you are suffering back pain due to long siting, lifting, bending, golfing, or driving, a steel stabilizer back support could help you out. Just add it to cart and we provide no reason money back guarantee within your first week of use! Find it not fit, or any other problems, just feel to with us for the return and refund. And we appreciate for any product suggestions.Great for long siting office workers, drivers, housewife, fitness buff, and people who suffers lower back pain or need support the back to keep the spine straight. Works well in weight listing, bending, workout, houseworking, yoga, golfing, long siting office work and long distance driving. Helps relieve lower back pain from strains, sprains and muscle spasms, protect your back from lifting, golfing and other activities, keep back straight and correct siting posture. Two Size for option, S M size suits for belly size 25"- 32", L size suits for belly size 32"- 44". Please measure the size around belly not waist. If you are around 32", please go the L size. Neoprene, 9 inch wide back area support with 4 steel stabilizers, provides good support along the lower back and lumbar area.