Enjoy a more rejuvenating night's rest with the SensorPEDIC 4-inch Supreme Cool Transcend Memory Foam Bed Topper, featuring two inches of gel-infused memory foam that dissipates body heat and is lab tested to sleep cooler than regular foam atop two inches of high-density, open-cell support foam. The pressure-relieving foam features the iCOOL Technology System that is engineered for maximum airflow to keep you cooler throughout the night. The breathable, cooling fabric cover with MicroShield antimicrobial protection helps you sleep cooler and wake refreshed. The VentAir mesh gussets on each side aid airflow, while the nonskid bottom ensures this topper stays in place night after night. Allow 48 hours for this product to return to its original shape. Topper dimensions may be sized slightly smaller than your mattress for a secure fit under your sheets. Remove from packaging within 72 hours. After unwrapping, air product for a few hours to eliminate trapped odors.