WEB1-48 of 652 results for "twin mattress clearance sale" Results. Check each product page for other buying options. Price and other details may vary based on product size and color. NapQueen 8 Inch Maxima Hybrid Mattress, Twin Size, Cooling Gel Infused Memory Foam and Innerspring Mattress, Bed in a Box,White & Gray. Twin. Options: 5 sizes. 4,644.