Great seat cushion
I weigh a lot and it works great. I use it for 8-11 hours per day on a chair at work. If your chair angles up, you need to move it back a bit so it's on your bum and not you thighs. It cut the seat temperature in half. I have a chair seat that doesn't breath and this cushion allows that. I've ordered another cushion for my desk chair at home too.
Rating: 4 stars