The Sealy Cotton Cozy Rest 2-Stage Crib Mattress offers a luxurious cotton cover with 2 stages of firmness for infants and toddlers. The cozy soft cotton cover is both waterproof and stain-resistant. The 204 premium steel coil system that creates ultimate mattress firmness, enhanced with border wire along the edges. An anti-sag weight distribution system provides a firmer infant side. An extra plush cotton layer on the toddler side provides luxurious comfort and support for your growing one. A protective cotton wrap encircles the entire mattress. Measures 51.88” x 27.5” x 5.75” and fits both USA standard size cribs and toddler beds. Sealy is the leader in sleep technology and the best-selling crib mattress brand in North America and proudly supports infants and toddlers with industry-leading crib mattresses known for safety, quality, comfort and premium support. This crib mattress passes all the latest ASTM tests for proper crib fit sizing, lock-stitched binding for safety and help educate caregivers about safe sleep and SIDS. Meets the Children’s Safe Products Act and Chemicals of High Concern to Children regulations as introduced by states like Washington and Vermont, among others. Pass CPSIA testing for lead and phthalates and each component is air quality tested for a healthier indoor environment. This mattress is GREENGUARD Gold Certified, tested for harmful chemical emissions at an independent laboratory. Sealy crib mattresses are made in the USA and backed with a Lifetime warranty on all workmanship and materials. Use for infants and toddlers approximately 0-5 years. Tested for a snug fit inside standard cribs and toddler beds for years of use.