I've got a real problem with my lower back which somtimes manifests itself as sciatica. Having to sit all day at work isn't good, even if you try to get your posture right. So I thought I'd give this belt a try and I'm really impressed. I can sit for hours without getting the pain in my hip and knee and when I get up out of the chair I still get no pain. You do tend to get a bit sweaty under the belt when wearing it for a while but I'd rather have that than the pain. Also, having to wear a suit for work, you can't really fit it under your clothes. It's ok on dress down Friday's as you can wear it with jeans and under a t-shirt.