Used once. It’s a full and our son is 5’11” tall so this did not work for him at all. Description from Sam’s Club The Member's Mark Hotel Premier Collection 12-Inch Mattress offers cooler, deeper sleep and unparalleled comfort. Superior cooling gel memory foam maintains your optimal sleep temperature and relieves pressure for all-night comfort. Unique air channel foam increases airflow for freshness and breathability. As part of our Member's Mark collection, it delivers exceptional quality, superior comfort, and long-lasting durability, with pricing exclusively for our members. The result is a hotel-style sleep experience that helps you fall asleep faster and deeply sleep for longer. Luxurious Hotel-Style Sleep Enjoy all-night cooling from a superior four-layer design. The top layer has a luxurious cool-to-the-touch cover above soft, soothing foam. Cooling gel memory foam continuously soothes as you sleep. The medium-firm support provides the perfect balance of comfort and structure to support any sleep position. Four-laver Design Delivers Constant Coolness & Comfort Designed to provide the same uplifting support and superior night's rest as premier hotel mattresses, this Hotel Premier Collection queen mattress has layers of foam for comfort and support. A cool-to-the-touch cover encloses the top layer of soft soothing foam with three inches of cooling premium gel memory foam to keep your body at the optimal temperature for deeper, undisturbed sleep. The 3-inch air channel foam relieves pressure and improves breathability, while the custom base foam provides structural support and durability. Can this mattress be used on an adjustable base? Yes, the Member's Mark Hotel Premier Collection 12-Inch Mattress can be used on an adjustable base, platform bed or any box spring. What kind of foam is used in the mattress? Four layers of foam from soft and soothing to cooling gel memory foam are used. All of the foam is CertiPUR-US® certified and made in the USA. It contains no heavy metals, phthalates or ozone depleters. Regular price $349 $200 or best offer.