The Dream On Me 3" Extra Firm Mini/Portable Crib Mattress gives way to premium support and comfort for your baby. Rest easy knowing this mattress is constructed with quality materials. Features include high-density foam, a hypoallergenic, anti-bacterial waterproof cover that aids in the prevention of mold, mildew, and odor. Easily wipes clean with warm water and mild soap. Green Guard Gold Certified to ensure the highest level of health, safety and peace of mind. Passes all flammability tests (16 CFR 1632 /1633) and also passes phthalate, lead and toxicity tests.