DESC: Made of Plush Laminate; 90% Polyester - 10% Rayon Cover 220 Inner Spring Coils Features Reinforced Double Laminated Cover, Toddler Bed Fit, Integrated Air Filtering Mechanism, Square Corners Protective Qualities: Hypoallergenic, Tear Resistant, StaphGuard Anti-Bacterial Treatment Wipe Clean with Damp Cloth 52 x 27.50 x 5.50 inches; Height of Mattress and Base is 5.50, Manufacturer: Kolcraft