Twin Size 7-inch Memory Foam Mattress with Cool AirFlow Layers * Made with 2-inches of quality 5.3lb High Density 100-percent Viscoelastic Memory Foam. Available in playful colors! Anti-Microbial and Dust Mite Resistant * Responds to your body temperature. Relieves pressure points to improve comfort and reduce body aches * Gives your children the proper sleep they need to grow and be active * Twin Size is 38-inches by 75-inches. 20-year warranty and 90 day in home trial