Designed to last through your baby's early childhood, the Novogratz Harper Crib & Toddler Mattress' resilient design was constructed with your little one's needs in mind. Made with cotton, polyester and wool fibers, the Harper's high-density thermo-bonded core will provide your baby with the firm support it needs. What's more, the mattress has a comfortable, removable, water resistant and washable cover that is made from polyester and rayon of bamboo. The Harper can be used first as your child's crib mattress, and subsequently in their toddler bed as they get older. Pair with the Novogratz Harper 3-in-1 Convertible Crib or the Novogratz Parker 3-in-1 Two-Tone Crib to complete your nursery. This mattress has achieved GREENGUARD Gold Certification. GREENGUARD Certified products are certified to GREENGUARD standards for low chemical emissions into indoor air during product usage. The Harper is assembled in Canada with imported materials, is made without the use of flame retardant chemicals and comes with a 15-year limited warranty.