Get from Amazon.com : https://www.amazon.com/gp/product/B008HPP7XA?tag=livelifeacti-20

My First Crib Mattress Memory Foam Crib Mattress Removable Waterproof Cover Plush


Baby mattress measures 51-58 x 27-14 x 5 and fits all standard cribs
Baby crib mattress is constructed of premium CertiPUR-US certified flexible polyurethane foam
The removable crib mattress cover is soft washable and waterproof
Baby mattress meets and exceeds federal flammability and CPSC standards
Hypoallergenic crib mattress is mite-proof anti-microbial phthalate and lead free