Whether it's spit-up, urine, or other messes, crib mattress can get messy fast! Our patented waterproofing made without harmful chemicals is quick and easy to wipe clean. Firmness is one of the most important safety features for your baby's mattress. The Consumer Product Safety Commission (CPSC) recommends a firm, flat surface. Our mattress doesn't sag, and our reinforced edge support stands up to bouncing toddlers. The dual firmness or "2-stage" option features a firmer side for infants and a cushion firm side for toddlers. This design provides a firmness level that is better tailored to your baby's needs as they grow.