Sharper Image 4" Ultra-Layered Memory Foam Mattress Topper, Queen 100% Polyester Imported 4lb. Premium Memory Foam + High Resiliency Base Foam Reduces body's pressure points to improve overall circulation resulting in the prevention of sleep disruption Naturally antimicrobial and resistant to dust mites Adjust your mattress' firmness with this dual-sided, multi-density topper to customize comfort Comfortable, quilted, breathable cover included