Their first "big-kid bed" is a big deal—and Naturepedic's 2-in-1 Organic Kids Mattress brings peace of mind to this major transition. Its adaptable 2-stage design features a wipe-clean, waterproof side for the potty-training period, then flips to a softer, quilted side as your child grows. It's made of organic cotton that's gentle on sensitive skin, plus food-grade waterproofing derived from sugarcane. The hypoallergenic mattress offers solid, comfortable support with layers of organic cotton over a premium innerspring, and it's built on the firmer side to support kids' developing bones.