Dream on Me Portable Crib Mattress Dream on Me Portable Crib Mattress fits into all standard size portable cribs and creates a cloud-like environment for long hours of sleep. This soft mattress is 3" thick and is made of high quality materials. It has a non-allergenic cover that is antibacterial and waterproof. This cover can prevent growth of mildew, mold and odor. All you need to do is wipe it with mild soap and warm water and it's as clean as new. Features Antibacterial and waterproof Fits standard portable cribs Made in the USA Portable crib mattress Easy to clean Cover prevents mildew, mold and odor Complies with Federal Flammability Standard 16 CFR 1633 Phthalate-free