Get a restful night's sleep wherever you are with the Milliard 4-inch Tri Folding Mattress. This portable mattress features a removable cover and non-slip bottom, making it perfect for any adventure. Its 4 inches of medium-firm polyurethane foam provide custom body support and rich softness, without the clunky springs or bed frames that can interfere with your sleep. Features: Hypoallergenic, Orthopedic, and Removable Cover for your convenience Low Profile Foundation, Under 6 Inch Thickness, and Specialty Size Ideal for a Mattress Only or RV Mattress Medium Mattress Support Dimensions: Folded: 25 inches wide x 25 inches long x 12 inches high Flat: 25 inches wide x 75 inches long x 4 inches high Packaging Instructions: Tightly packed in a portable box for your convenience Remove from packaging within 72 hours to maximize foam expansion You can sleep on it the same night it is unwrapped, but allow 48 hours to fully expand Air the product for a few hours upon unwrapping to eliminate trapped odors Slight variances in dimensions may occur due to machine-cutting manufacturing processes CertiPUR-US Certified: This foam has been rigorously tested and certified to be free from harmful substances like CFC's, ozone depleters, PBDE flame retardants, lead, mercury, heavy metals, formaldehyde, and prohibited phthalates. It also has low VOC emissions to ensure your health and indoor air quality. Trust the Milliard brand for almost a decade of quality and comfort. Please note that once opened, this product is non-returnable. Foam Tips: Please keep in mind that the firmness level of similar foam products may produce different results.