The Simmons BeautySleep Naturally Refreshing Glow Crib & Toddler Mattress has a renewable soy enhanced core that is firm and soothing so baby sleeps better. Greenguard & Certipur-us certified. Sleep-4-Years Mattress: one side provides ideal firmness for newborns and the flip side offers a soy layer for toddlers. Breathtakingly soft water resistant natural fabric cover offers soothing comfort. Chemical free cotton wrap. Mattress meets or exceeds all federal flammability standards without the use of harmful chemicals. Limited lifetime warranty against defects in materials and workmanship.