12 Inch Soft Sleeper 5.5 King RV/Truck Mattress Bed With 4 Inches of Visco Elastic Memory Foam Assembly Required USA Made Assembly required. Three separate layers of foam and removable expandable mattress pad cover. 4" layer of Soft Sleeper Firm Superior Support Foam for spinal alignment and transitional support. 4" layer of Soft Sleeper Medium Firm Transitional Support Foam 4" layer of Soft Sleeper 5.5 Visco Elastic Memory Foam, and a removable, washable, Expand-A-Cover 30 NIGHT SLEEP TRIAL! 3 Year Soft Sleeper Manufacturer Limited Warranty! Not For Home or Mobile Home Use