2-in-1 dual sided design – The infant side is firmer and has an USDA certified Organic Cotton layer for better support. The toddler side features Natural Latex for enhanced comfort. Infant Side: Breathable mesh fabric waterproof cover enhances ventilation. Keeps your baby cooler and prevents overheating.Toddler Side: Waterproof cover with 100% Organic Cotton top layer cradles your baby's delicate skin. Non-toxic, non-allergenic and luxurious to the touch..182 heavy duty 15.5 gauge steels coils provide maximum durability and support to baby's developing spine. 9 Gauge border rods and Flex Edge Clips offer extra strength and support.Natural Coconut fiber layers offers additional durability. Air-vents help keep mattress fresh. Fits all standard size cribs and toddler beds. Size: 52" x 27.5" x 5.75”Proudly made in the U.S.A. from domestic and imported sources. Lifetime warranty.