Memory Foam Hybrid Mattress Twin XL Breathability PlusSleep cooler, wake refreshed with the Memory Foam Hybrid Mattress Twin XL BreathabilityPlus. This mediumfeel mattress blends breathable design with dependable support to help you start each day energized and ready. Crafted as a true memory foam hybrid, it pairs a robust base of tempered steel springs with a plush, contouring memory foam top layer. A breathable knit cover and responsive foams work together to cradle your body while promoting airflow