moongaze 5 Inch Narrow Twin Mattress for Kids and Adults, Gel Memory Foam Mattress in a Box, Pressure Relief, Medium Firm Support, CertiPUR-US Certified, Fiberglass-Free, 75" L x 30" W Narrow Twin 5"- Cooling Gel is up for auction in Home & Kitchen. The current bid is $23.00, 77% below the $99.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.