It slides off every office or kitchen chair when you're trying to sit on it.
There is no grip with the cover they provide and it's a bit too big so some of it will tend to hang over edges or curl up if you try pushing back and in all the way to prevent this problem and that still doesn't work.  Any positioning you try, it just slips down and off the front of the chair while you're using it.  I needed this to work a desk job with sciatica.  Can't work with a seat you can't keep on the chair.  While I rated it high for pain relief, that would only be the case if you could keep it under your butt, but the thick soft egg crate design would probably be great IF it came with a no-slip cover and fit better into the chair.
Rating: 1 stars