I wanted to wait a couple weeks before reviewing this memory foam seat. I wanted to ge sure I gave it ample time to expand and to air out. When we first got it everyone was so excited and immediately wanted to use it. After only a short time the smell was do intense we had to put it in our bavk room with the windows open and the fan going. The smell improved but has not gone away completely. We are in week 3. I'm hoping it will only get better because that is the only reason I took a star. It is huge, comfortable and our twins love it. The foam is contained in a Nylon type fabric with a nice double zipper. The outside cover is polyester and has a faux suede appearance. I wish there was a way to get rid of the smell faster but I think it will just take time. Otherwise it's great!