The Bonnell spring system is made from heavy gauge steel coils to provide firm support. 1.25 High Density Foam, 4.5 Viscolatex Comfort Foam, and 6 heavy duty coils. Infused with Natural Green Tea extract and Castor Natural Seed Oil to neutralize and remove odors. Foam is CertiPUR-US Certified for durability, performance and content. King size: 76 W x 80 L.The item "12 Inch Zinus Spring Support King Size Mattress Green Tea Memory Foam Slumber 1" is in sale since Thursday, August 20, 2020. This item is in the category "Home & Garden\Furniture\Beds & Mattresses\Mattresses". The seller is "niclopez_29" and is located in Kansas City, Missouri. This item can be shipped to United States.