Naturepedic's Breathable Organic 2-Stage Crib Mattress is a must-have in the nursery. It's crafted with organic cotton fabric and fill that's free of flame retardants and potential allergens. Plus it's waterproof at the surface and wrapped in a removable, washable, breathable cover—so the design's increased airflow doesn't compromise on cleanliness. The hypoallergenic mattress's lightweight core supports baby's developing muscles and bones yet allows for quick, easy sheet changes. The unique dual-stage design offers a firm side for infants and a medium-firm side for toddlers, so it grows right alongside your little one. And its reinforced edges are an added safety bonus for rambunctious, bouncing toddlers.