Habitat 8" Pure Latex And Certi-Pur Non Toxic Hybrid King 76x80 Mattress Provides uplifting buoyancy without sinking, makes turning easy Natural Latex on top relieves pressure points, distributes weight effectively Certi-Pur support foam layers beneath, will not compress or form ruts Certi-Pur support foam layers are VOC free, and contain no formaldehyde 90 Day No Questions Asked Trial Period, Free Shipping 1-800-313-2591