Combine your sleeping pad with the Big Agnes Sleeping Giant memory foam layer to make the most comfortable pad available. Sized specifically to fit 20 x 66 inch sleeping pads. Memory foam molds to the curves of your body, relieving pressure points. Includes memory foam pad and cover. Upgrade your existing sleeping pad with this memory foam kit by inserting your own sleeping pad into the cover with the memory foam. Durable 70D nylon ripstop top and bottom. Wrap around closure flap. Warmth rating to 0degF.