The Dream On Me Asheville 4” Firm Fiber Crib And Toddler Mattress is the perfect blend of safety with comfort. Proudly made in the USA, it is Greenguard Gold Certified to ensure optimum health, safety and peace of mind and comes with a 10-year limited warranty. The mattress features a 4” polyester fiber core for firm comfort as recommended by pediatricians and consumer guidebooks for maximum infant support and safety. It has a durable, reversible design: an ultra firm infant side for optimal support & firm toddler side. At 6.5 Lbs, it is lightweight for easy sheet changing. The square corners ensure a snug fit in standard full-size cribs and toddler beds. Mattress dimensions are 51.75” L X 27.5” W X 4” H.