When I first got this cushion I was certain I could knock someone out with it. It's very light, but it was stiff as a board when I pulled it from the packaging. I gave it a chance and now I use it all the time at work. Granted, it's hard NOT to improve upon the chairs I have to sit on at work, but with several days of use I noticed that this cushion began to get softer. I'm hoping there's a happy medium and that it doesn't continue to get softer. I would be very disappointed if it began to fall apart. It serves its purpose for now though. It just took time to break it in.I got this as a seat cushion for a chair in my office at work- was excited to find one that was round rather than square. When I received it I was surprised at how small it was. I've taken a picture of it with a regular dinner plate on top for reference. You can barely see the cushion beyond the edge of the plate.I felt like I could still make it work, so I put it on a chair and sat down- the wooden chair was actually more comfortable without the cushion. This is stiff, rather unyielding memory foam and just doesn't give enough to make a difference when sitting on it, unfortunately.The cover of the cushion is a nice jersey knit, and it does have a zipper. So those are nice features. But because it is so small and rather uncomfortable, I would never be able to justify paying $15 for it. Will be sending it back.This cushion helps to reduce pain on the back or bottom when needed. I wish it was a little bit larger for the bigger butt.I got this for my submissive who was complaining about the hard wood floors being too much on his knees so I got this pad to alleviate those aches. It’s large enough that he can kneel on it but small enough that it’s just for his knees. So far he’s appreciative that he gets a little comfort.I bought this to use on a chair with a firm chair, that sometimes feels just a bit too firm. This isn't a thick cushion, but adds just the right amount of softness on top of the built in cushion. I like that the size is small, as the chair seat is a little small, and some of the cushions are too big for it.This isn't a cushion that you would want if you need to sit on a wooden chair all day, but if you need a bit of extra softness on an upholstered chair, this one is a good one to try.This is a Vine review of a free product. As a Vine Reviewer I only review products that I have a genuine use for and/or some previous knowledge and experience about in order to give a fair and unbiased review.I know that it states that these are 11” in the description, but I was still surprised at how tiny this was. It’s about as big as a dinner plate. I haven’t even seen bar stools with seats this small. No use at all for sitting on unless you are a small child. I ended up stuffing it under my office chair cover as a bit of extra back padding.This is a Vine review of a free product. As a Vine Reviewer I only review products that I have a genuine use for and/or some previous knowledge and experience about in order to give a fair and unbiased reviewI’m not exactly sure what I can use this for, maybe a stool? Or the knee cushion is a good idea. But it’s way too small for a normal sized chair and that should be indicated in the seller’s listing. It would save on a lot of returns.