Spring Air Hybrid Kirby Euro Top Plush MattressThe Kirby collection from Spring Air offers a combination of exceptional back support and pressure relieving comfort. Luxurious cooling cover wicks moisture and heat away for a healthy temperature neutral sleep. 1 layer of high density soft quilting foam, 1 layer of cooling gel memory foam for pressure relief with cooling effect. 25% Thicker Coils in the center 1 3 of the Mattress Foam encased for a larger sleep surface and edge support Zoned