LUCID 12 Inch Gel Memory Foam Mattress - Triple-Layer - 4 Pound Density Ventilated Gel Foam - CertiPUR-US Certified - 10-Year U.S. Warranty - King Medium-plush feel; 12" memory foam mattress with 3" ventilated gel memory foam surface, 1" bamboo charcoal memory foam support layer and 8" high density foam base Top memory foam layer infused with gel beads to prevent overheating Ventilated design improves breathability of sleep layer; open cell construction yields a longer lasting, more resilient foam that resists lasting body impressions TENCEL Lyocell blend cover adds softness and moisture-wicking comfort 10-Year U.S. Warranty; mattress is compressed, rolled and shipped in a box for convenient setup