The DaVinci Complete Slumber Waterproof Mini Crib Mattress is designed with high-density fibre fill for an extra firm sleeping surface that is GREENGUARD Gold certified and 100% non-toxic, so your baby can sleep safely and comfortably. Parents can easily change crib sheets with this ultra-lightweight mattress that weighs only 3.75 lbs! This mattress features a waterproof, tear-resistant cover that will stay new through years of use.