The Simmons Kids BeautySleep Sleepy Whispers Supreme 234 Coil Crib and Toddler Mattress is a 2 "n" 1 crib mattress featuring a 234 coil interlocking system that provides outstanding support and lasting durability for your infant to toddler. Innofoam corners help create a sturdier mattress, while its woven fabric cover is water-resistant, Greenguard/CertiPUR-US certified, and made in the USA. A trusted brand by mom"s for more than 140 years, this mattress meets and/or exceeds federal standards for flammability and comes with a limited 50-year manufacturer warranty.