I did a lot of research and this is the best value for the price that I have found. The approximately 2" memory foam with 1.5" topper makes my 15+ year old mattress feel brand new! The memory foam has no "cover", but the topper wraps around the foam and mattress with ease. My girlfriend and I sleep better than ever before. I like firm beds and was worried that I would "sink", but feels great and cradles your body just enough for a comfort feel. This product also helps reduce movement from the person sleeping next to you. Please take my advice and purchase this product over its competitors. The extra $$$ for the so called "premium" memory foams are not worth it!