Nylon top cover is fluid-resistant and easy to clean for extended life and service Vinyl bottom is waterproof Fire Retardant: Mattress meets the requirements of 16 CFR Part 1632 – Standard for the Flammability of Mattresses and Mattress Pads and 16 CFR Part 1633 (Federal Flammability (open flame) standard for mattress sets) when used without a foundation High-Density foam mattress for the bariatric patient Solid foam inner core provides comfort, support and durability in a one-piece constructionLatex free