The Sleep Philosophy 3 inch Gel Memory Foam Topper features a unique convoluted design to provide maximum airflow, along with the cooling gel-infused memory foam, providing the optimum sleeping comfort. Along with keeping you crisp and cool, this topper helps to alleviate pressure points while the 2.5 lb. density temperature control foam adjusts to your body temperature. Memory foam is resistant to dust mites and is naturally antimicrobial. The topper is also reversible if you prefer a flat sleeping surface. Another feature we know you-l appreciate is that our slightly oversized topper comes in full mattress sizes to give your bed end-to-end coverage. Our packaging technology allows the mattress topper to be efficiently compressed into one box that's easily shipped to your door. Simply unbox, unroll, and this mattress topper does the rest, expanding to its original shape within 72 hours.