Adjustable Back Brace Lumbar Support with Breathable Spandex Panel & Hook Loop Fastener - Posture Corrector for Office Work, Heavy Lifting & Back Pain Relief - Includes Removable Straps & Suspenders

I have used the med size before (for almost two years now). The size runs a bit small, so if you normally wears med, you should order the large size for a better fit.The lumbar support offers very good support, which explain why I purchased another large size one, since the med was a bit tight. We have three of the med size in our office used by other colleagues. I use this for work and at home to alleviate back pain, and it worked very well. The lumbar support may also prevent further back injury if used while lifting. The shoulder strap is less useful for me, so it was never used. You can use the lumbar support while sitting in front of a computer as well to improve your posture, and prevent back pain. I wear it several hours at a time without any discomfort. Overall, very happy with the purchase. The Velcro strap is also very easy to adjust, and very durable, and works fine even after two years of constant use.One thing for the vendor to consider is to add a stiffer support on the back, perhaps a thin metal plate(?) to further improve the lumbar support. This will most likely increase the price, but I would spend the extra money for a better support. The product is already great as is, but can be made better for those that suffers back pain. For back pain prevention or to prevent lumbar damage from heavy lifting, this is highly recommended.