The Simmons Beautyrest Beginnings Sophisticated Sleep Firm Crib & Toddler Mattress has 231 Beautyrest pocketed coil springs for long lasting support. Greenguard & Certipur-us certified. Sleep-4-Years Mattress: one side provides ideal firmness for newborns and the flip side offers convoluted foam comfort for toddlers. Reinforced border edge increases stability and Innofoam corner protectors create a sturdier mattress. Easy to clean MoistureBan hypoallergenic fabric cover repels wetness helping baby to stay dry and comfy. Mattress meets or exceeds all federal flammability standards without the use of harmful chemcials. Limited lifetime warranty against defects in materials and workmanship.