The inside of the cradleboard is padded with a lining of fresh plant fibres, such as sphagnum moss, cattail down, or shredded bark from juniper or cliffrose. The lining serves as a disposable diaper, although the Navajo could clean and reuse the lining made of shredded juniper or cliffrose bark. These plant fibres have antiseptic properties, they keep the infant's skin healthy. The Chippewa tradition was to make a lining for the cradleboard usually from moss growing in cranberry marshes. Before it is used, the moss is smoked over a fire to kill insects; afterwards it is rubbed and pulled to soften it. In cold weather, the infant's feet may be wrapped in rabbit skin with the fur facing inward. The moss lining is surrounded by a birch bark tray insert placed into the cradleboard, which could be removed for cleaning.