QUESTION: Do I use the foam mattress alone or does it go on top of the regular mattress ANSWER: The foam mattresses are used directly on top of a bed frame. There is no need to have another mattress under it. For more discussions, options and details about the product, or to order the product, please click here High quality dense foam for firm support. Water resistant vinyl cover with ventilating holes. High quality dense foam for firm support Water resistant vinyl cover with ventilating holes Pressure reducing convoluted foam topper on one side Easy removal zippered cover for washing Comfortable firmness throughout Durable construction designed for long term use Compressed packing for easy delivery and minimum storage space Fire retardant product 36" x 80" x 7" Shipping weight: 22 lbs. Weight capacity: 250 lbs. HCPCS Code: E0272 MODEL # T701CP T703CP T714CP WIDTH 36" 36" 42" LENGTH 80" 84" 80" HEIGHT 7" 7" 7" WEIGHT 35 lbs 37 lbs 37 lbs PACKAGING 1 / CASE 1 / CASE 1 / CASE