FDW 8 inch Twin Mattress Gel Memory Foam Mattress for Cool Sleep & Pressure Relief, Medium Firm Mattresses CertiPUR-US Certified/Bed-in-a-Box/Pressure Relieving (8 in, Twin) White Twin 8 IN is up for auction in Home & Kitchen. The current bid is $56.75, 43% below the $99.98 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.