Economical and cutting-edge crib mattress. Waterproof durable nylon cover. 2-sided design for infants and toddlers. Hypo-allergenic with welded anti-microbial seams. Dimensions: 52L x 27.5W x 5H inches. We all want the best for our children so starting on day 1 get them one of the safest mattresses on the market with the Moonlight Slumber Little Dreamer All Foam Dual Firmness Crib Mattress. The exterior of this mattress is covered in a waterproof nylon with an interior fire barrier that is resistant to open flames. The center is a slab of high-density foam that will be able to keep its shape for years but that's not even the good part. One side of the mattress is designed for infants with a bed of firm foam to support their little bodies while they sleep. The other side meant for toddlers features NASA's own visco-elastic memory foam which conforms to your child's shape so that they'll always be comfortable and supported while they sleep. This mattress is PVC and vinyl free and has a weight capacity of 250 lbs.