4-inch ventilated memory foam topper to upgrade your sleep quality Ventilated design optimizes airflow and reduces trapped body heat Responsive active suspension isolates motion to provide undisturbed sleep for you and your partner CertiPUR-US certified memory foam 3-year manufacturer's warranty Instantly upgrade your old mattress with Best Price Mattress' ventilated bed toppers. It's a mattress topper pad, made with 4 inches of CertiPUR-US certified, premium memory foam to revamp your old mattress for maximum comfort and improved sleep quality. Its breathable open cell design optimizes airflow, reducing body heat and helping to keep your topper fresh for a longer time. Memory foam is well known for its body contouring features and pressure relief comfort throughout your whole body. Once you lay down, our memory foam toppers will start reacting to the temperature of your body and begin to mold itself to your shape, evenly distributing your weight.