Simmons 2 Stage Ultra Firm Crib Mattress with Cool Touch Cover is the perfect healthy addition to your baby's nursery for countless hours of safe and peaceful sleep from crib to toddler bed! The Eco Dura Bond recycled polyester core is made with no foam which means no off-gassing. It's 99.9% free of phthalates and volatile organic compounds (VOC's). Unlike foam which doesn't breathe, this core is breathable ensuring that there is continual airflow in your baby's sleep environment. The side meant specifically for your newborn up to 12 months provides the right firmness as recommended by all pediatricians. The toddler side for after 12 months is more comfortable for when your toddler needs more comfort and a little less firmness. The Eco Dura Bond core provides a uniform flat sleep surface with fewer pressure points than traditional steel innersprings. The lightweight construction makes changing sheets fast and easy. Made in a square corner design it provides a super snug fit in the crib. It's an ideal choice for toddler beds too. Cool Touch cover is thermo regulating, soft and breathable too to help keep baby from overheating. Firm uniform support with fewer pressure points and greater comfort Firm side for infants to 12 months, more comfortable side for toddler after 12 months Eco Dura Bond recycled polyester core is breathable and 99.9% VOC free Cool Touch cover is thermo regulating, soft and breathable Made in Canada - Lifetime Warranty