CONTOURING COMFORT: 4.5 inches of gel memory foam, 3.75 inches of convoluted transition foam, and 3.75 inches of convoluted base foam create a breathable, plush mattress COOLING AND BREATHABLE: Memory foam is infused with gel beads for better temperature regulation and pairs with breathable ventilation and a waved convolution design for better airflow VERSATILE SIZE AND FEEL: 12-inch profile is perfect for primary bedrooms, rental properties, or guest bedrooms with a plush feel that back and side sleepers love; can be used with any bed frame including a metal grid, platform, slat, or traditional box spring EASY SETUP: Gel memory foam mattress is rolled, compressed, and boxed for convenient delivery and setup; remove the packaging and allow the mattress to decompress for 24-72 hours, may take longer in a colder environment ASSEMBLED IN THE USA: Linenspa gel memory foam mattress is fiberglass free and backed by a 10-year warranty that guards against manufacturer defects; CertiPUR-US certified and OEKO-TEX Standard 100 certified; assembled in the United States