Rest easy with the memory foam support of the Sleep Master Memory Foam mattress from Zinus, pioneers in comfort innovation. The 6 Inch Memory Foam Mattress provides conforming comfort with a memory foam layer that molds to the natural shape of your body. The full support high density foam base layer provides long lasting durability and stability. Please open your mattress package within 72 hours of receipt and allow 48 hours for your new mattress to return to its original, plush shape. Worry free 10 year limited warranty. Another comfort innovation from Zinus. Pioneering comfort.