Customize your comfort for the ultimate sleep with this 12-inch mattress from Slumber Solutions. The 6-inch base foam layer is paired with 4 inches of comfort foam and 2 inches of cooling gel memory foam. Choose from six sizes and three support levels to suit your preferences. Features: 6-inch base foam layer 4-inch comfort foam layer 2-inch gel memory foam layer Soft knit cover Disperses body heat Eliminates motion transfer and relief on uncomfortable pressure points Choose from soft, medium, or firm comfort level Compatible with any box spring or platform foundation Never needs turning Spot clean only Available in 6 sizes Dimensions: Twin: 12 inches high x 38 inches wide x 75 inches long Twin XL: 12 inches high x 38 inches wide x 80 inches long Full: 12 inches high x 54 inches wide x 75 inches long Queen: 12 inches high x 60 inches wide x 80 inches long King: 12 inches high x 76 inches wide x 80 inches long California King: 12 inches high x 84 inches wide x 72 inches long   Please note that all sizes of this mattresses are compressed, folded and rolled into the same size 41x20x20 shipping box, they ALL look like a Twin size when compressed and rolled. However, once the opened the mattress it will expand to the proper size.