The Delta Children SmartBreathe Washable Toddler Mattress maximizes airflow and supports growing toddlers. It features a breathable knit cover that’s fully removable and machine washable for easy clean up. For additional protection, a waterproof barrier keeps the foam core dry and clean. A healthy and safe choice for your little one, this toddler mattress is GREENGUARD Gold certified and made with CertiPUR-US certified foam. Tested to meet or exceed the most stringent chemical emissions standards to create a healthier home for your child, it has been screened for more than 10,000 chemicals and VOCs that are known to pollute indoor air. Certified to contribute to cleaner indoor air, you can feel good about putting this mattress in your child’s bedroom. Compressed and shipped in an easy to manage box, all you need to do to set up this toddler mattress is unpack, unroll, and allow up to 48 hours for full expansion.