From BodiPEDIC, the 3-Inch Gel-Infused Memory Foam Mattress Topper with Cooling Cover feature: 3-inch supportive AeroFusion memory foam gently cradles the body to relieve pressure points and enhance spinal alignment and is infused with cooling gel to promote heat dissipation for refreshing slumber Odor-free memory foam meets CertiPUR-US standards for content, emissions, and durability for long-lasting comfort. Built-in AeroFusion Ventilation Technology allows for maximum airflow and temperature regulation to promote heat dissipation for cooler rest  Included circular-knit fabric cover is infused with cooling yarns to add a layer of smooth softness and cool-to-the-touch comfort and is removable for easy cleaning Memory foam fill  Twin approx. 74" L x 38" W x 3" H; weight 8.5 lb. Twin Extra Long approx. 79" L x 38" W x 3" H; weight 9.1 lb.  Full approx. 74" L x 53" W x 3" H; weight 11.9 lb.  Queen approx. 79" L x 59" W x 3" H; weight 14.1 lb.  King approx. 79" L x 75" W x 3" H; weight 17.9 lb. California King approx. 83" L x 71" W x 3" H; weight 17.8 lb.  Fabric content: Top and Gusset:  Polyester/Polyethylene, Bottom: Polyester/Cotton  Each mattress topper includes a cool-to-the-touch circular-knit fabric cover that adds a layer of cooling softness and comfort Remove cover to machine wash and dry. Spot clean foam only. Do not machine wash or dry. Use mild detergent, no chlorine bleach. Allow to air dry away from direct sunlight. 5-year limited warranty Imported.