what kind of mattress to buy

{"cid":"91224417","title":"MOYI Factory Custom Modern Massage Sofa Floor Foam Hypo-allergenic Memory Foam Mattress High Density","imgUrl":"https:\/\/img.chinax.com\/nimg\/03\/66\/bd3e0469f33b7c360f018ea07d5e-200x200-1.jpg","attrs":{"Price":"$220 \/ set","Brand Name":"MOYI Furniture","Model Number":"M59","Minimum Order Quantity":"1 SET","Delivery Time":"25-30Days","material":"Fabric","application":"Living Room, Hotel, Apartment, Office Building, Mall, Other, Basement, Villa","feature":"Modular","design style":"Modern","inflatable":"No","sofa type":"Set","style":"Sectional","mail packing":"Y","Place of Origin":"China","Filling Material":"Foam","Cover Material":"Fabric","Leg Material":"Wood","Packing":"Standard Packing","OEM":"Accepted OEM","Frame Material":"Wood","Color":"Customer's Request","Warranty":"5 Years","Foam":"High density and high resilience foam(45%-65%)","Material":"Velvet","Size":"Accept Customize Size","Feature":"Modular, Comfortable","MOQ":"1 SET"}}