Twin Mattress, Hybrid Innerspring Double Mattress, Cool Bed with Breathable Soft Knitted Fabric CoverBody Conforming & Pressure Reliving The 7 zoned individual encased coils are positioned at the core of the mattress. On top, multi layers comfort foam are laid in place. This hybrid mattress has a certain amount of spring while also conforming to the body for targeted pressure relief, offering a balanced sleep experience for many individuals. Breathable Mattress to Sleep On The cool cover is made of dual layered soft knitted fabrics which is super