Product Description: Spring Air 3215 Copper Alloy Medium Mattress - Cooling cover infused with copper yarn (at least 30%), designed to offer antimicrobial, anti-inflammatory, and antiviral properties for a healthier sleep environment. Beneath the cover, a plush copper-infused memory foam layer gently contours to the body for soft, cloud-like comfort. A firm support foam layer enhances durability, minimizes motion transfer, and reinforces overall stability. Two medium comfort foam layers add further motion control while supporting the mattress structure. It is finished with a Tri-Zone Encased Coil System made up of 875 fabric-wrapped coils, with a reinforced center section to provide focused lumbar support where it’s needed most.