Olee Sleep 8 inch Firm 1" Memory Foam Top Innerspring Mattress (King) 08SM01K Hollow conjugated fiber with enhanced ventilation function. MEMORY FOAM Pressure-relief materials that adapts to your body shape, weight and temperature. 7.5 inch Dura coil system with exceptional durability For people like firm mattress 1 inch 8 ILD soft memory foam reliving body stress. 10 year Limited Manufacturer warranty