This premium mattress was designed specially for the Alma Urban Mini Crib – and the materials couldn't be better. This mattress is made from organic coir that's been farmed from an entirely organic plantation, in fact, the only one in the world. We love that the coir has a natural spring to it, but it completely natural to eliminate any nasty chemicals from the nursery. To guard against dust mites, the coir is covered in ample organic lambs wool that's been treated with essential oils. The oils used are lavender, lemon, and eucalyptus and they further discourage any mites. In addition to the health benefits of an all-natural mattress, the firmness of the Alma CocoMat Crib makes it safe for infants. As soft mattresses can be hazardous for sleeping babies, a firm mattress is necessary. The Alma CocoMat Crib Mattress is the perfect accessory for your new favorite crib.