Stearns and Foster Luxury Estate Halesworth Luxury Firm King Mattress and Box Spring Set Meet your sleep match. Mixing Smart Latex, a PrimaCool Quilt & PrimaCool Gel Memory Foam layers, this bed dissipates heat away from the body, increases airflow across the sleep surface & meets your curves & contours with consistent comfort. Quilting layers: PrimaCool Quilt infused with Outlast material has deluxe fibers of naturally breathable silk & wool woven around 2" of highly aerated foam to release excess heat Comfort layers: Smart Latex, PrimaCool Gel Memory Foam, PrimaSense HD Gel Foam & PrimaCore Gel Foam provide comfort & support & a balanced sleeping temperature Additional features: the PrimaCore Comfort Layer, innerspring system & comfort layers absorb motion & maintain long-lasting comfort Mattress height 15.25"