I bought this for work due to lumbar issues where I was having pain shoot down into my groin and shin. Turns out I had L5-S1 anterolisthesis and other typical foraminal narrowing and mild disc bulging of S4, S5. The only thing to know about this pad is that it is thick, so if your chair isn’t deep, you’re not going to like the lack of seating surface afterward. I personally prefer this pad to be more at the mid-back, with about 4 to 5 inches of space below it. This keeps the spine nice and arched. If the pad is sitting totally down on the chair seating surface, it doesn’t really do much. Luckily the straps on this are perfectly adequate to keep this from slipping down, however it may take some maneuvering of the straps to prevent the pad from slipping down. I put the lower strap around the same area of my chair as the top strap, where my chair back doesn’t allow the straps to fall down. So far, my lumbar issues are almost resolved and sitting at work isn’t miserable anymore, at least for comfort! ..More