Big Agnes Sleeping Giant Memory Foam Kit-Fits LEFTnotruc(Combine any pad with the Sleeping Giant memory foam layer to make the most comfortable pad available,500) Memory foam molds to the curves of your body, relieving pressure points Durable nylon rip-stop top and bottom Includes memory foam pad and cover Upgrade your existing sleeping pad with our memory foam kit by inserting your own sleeping pad into the cover with the memory foam