The DaVinci Deluxe Coil Dual-sided Crib & Toddler Mattress is designed with 160 coils and polyester fiber fill for an extra firm sleeping surface that is GREENGUARD Gold certified, so your baby can sleep safely and comfortably. This mattress features a waterproof, tear-resistant cover that will stay new through years of use.  The Deluxe Coil Crib & Toddler Mattress is dual-sided to grow with your baby – use the firm side during the baby years and the cushier side for toddler years.