You'll be drifting in a celestial realm when you lie down on the Simmons Slumber Time Cosmic Swirl 10 in. Plush Mattress. Let this mattress, with its traditional innerspring coil support system, will take you on a dreamy, interstellar tour! The mattress' surface repels water, and, for those of us who are prone to getting stuffy noises, sinus headaches, and all sorts of allergy-related bothers, this mattress is resistant to allergens. Optional 5.5- and 9-inch box springs are available.About Simmons:One of the world's leading names in the bedding industry, Simmons is known for introducing innovative bedding designs. From their Beautyrest Pocketed Coil technology to their new Recharge Sleep System, Simmons products are designed to help you get a better night's sleep and encourage a smart sleep routine.Sound Sleep GuaranteeOur Sound Sleep Guarantee lets you try out your new mattress and make sure you found the perfect one. Give your new mattress a try for 21 days that's about how long a new mattress takes to conform to your body and for you to get used to it. If after the first 21 days and up to the first 100 days after delivery you decide the mattress isn't for you, call us at 866-530-4157 and we'll come pick up the old one and exchange it for a different mattress for you. Here are the details:The “Sound Sleep Guarantee” applies only to the following brands: Laura Ashley, iMattress, King Koil, Sealy, Serta, Simmons, and Stearns & Foster. All other mattress brands cannot be returned.Pick-up and exchange is one time only per customer.A processing-and-pick-up fee of $99 is required.If you choose a new mattress with a higher price than the one we're picking up, you'll need to pay the difference.We are unable to accept returns or cancellations; only exchanges.Valid only within the 48 contiguous United States.