The Memory Foam Spring Hybrid Mattress, designed with conforming layers of top notch CertiPUR-US certified foams and heavy-duty steel innersprings, will have you resting comfortably from night one. Thanks to natural green-tea and active charcoal-infused foam, you can sink into a mattress that's clean and odor-free, all night, every night. Made to do more than just keep you minty-fresh, its conforming memory foam and Viscolatex foam layers cushion your joints and spine, allowing you to relax in the most natural position to alleviate pressure points. Its base layer of steel innersprings ensures support that's even and durable for many years to come. And in the interest of having your back, the Memory Foam Spring Hybrid Mattress also includes a 10-year worry-free warranty. Size: medium.