Visit the Vaunn Egg Crate Mattress Topper, Ventilated, Convoluted Foam for Pressure Sores and Pain Relief, Medical Grade Urethane for Therapeutic Support and Recovery, Hospital Bed Twin (79"" x 35"")PRESSURE AND PAIN RELIEF Medical grade urethane foam provides effective relief for pressure ulcers and sores on neck, shoulder, elbow, spine, hip, back and leg. Recommended and used by doctors and healthcare professionals. COOL AERATION TECHNOLOGY Unique convoluted airflow design regulates bodys temperature, reduce heat and moisture buildup through the night. Eliminate the use of memory foam or gel infused materials that tend to sink and retain body