Newborn babies should sleep on the purest materials available. Obasan's crib mattresses are especially made for newborns, with extra firm support and superior comfort. Obasan has chosen to use only pure wool in the padding of its infant mattresses due to the fact that wool is naturally antibacterial and breathable. The crib mattress is covered in a removable organic cotton jersey which allows it to be aired out and spot cleaned.

100% organic cotton protects against dust mites and mold, water resistant wool will also regulate body temperature, and natural rubber is durable and resilient. These materials are the heart of Obasan's infant collection.