Sadly our experience was not as good as I would have liked - I wanted a very firm foam that was thin - 0.5" that would be the base layer for a dog bed in the car - I would put memory foam on top that I already had - but wanted something that would be very firm, not compress fully and to take out the weight of the dog so it was comfy without being too soft - I picked the "Severe very firm foam sheet" option is it said "server very firm" and for smaller thicknesses - perfect I thought! (As height of whole bed is a concern) What I got sadly is less dense that memory foam I already have its useless for what I want it to do - and I bought the largest sheet they do. I did call and speak to them when it arrived to check that I had the right product and they said I did - but how on earth they can call it "severe very firm" I have no clue. I was told that I was not able to return it and that at 0.5" nothing would be very firm - so why give it that description! They did suggest an alternative that I could buy but at my own cost - but I found the person speaking on the phone hard to hear and not exactly sympathetic - I think it was a headset so the words came out slightly muddied. If I fold the foam over 8 times - yes its very firm - but that is then 4" deep. Whereas this was specially for 2" or less. I will end up using it for inside beds maybe double or trebled up - so much smaller but we have inside beds so its surplus currently. I would have ordered thicker if I knew I think. I just feel the description was very misleading and its a real shame Delivery was very quick though Best to maybe call and ask first before ordering which is a shame