Rest in total comfort with a memory foam sleep system. Bedding system includes three individual, customizable layers for ultimate comfort. Memory foam mattress system is completely adjustable to fit your personal level of comfort. From Overstock. Click on the product image below for a preview.  
10-inch Queen-size Accu-Gold Memory Foam RV Bed Component Sleep System Includes two support layers: one 3-inch firm base layer and one 3-inch medium firm base layerAccu-Gold visco elastic memory foam is comfortable and durableIncludes one 4-inch Accu-Gold 5.3 memory foam top layerMeasures 58 inches x 78 inches x 10 inchesDimensions: 78.0x58.0x10.0Warranty: 10 year Limited DistributorMaterials: Accu-Flex Polyurethane Foam, Accu-Gold 5.3 Memory Foam, T130 Poly Cotton Blend CoverClick on the product image above for more information.
10-inch Queen-size Accu-Gold Memory Foam RV Bed Component Sleep System - Preview | 
