bumGenius Stay-Dry Doublers provide a layer of moisture wicking protection while adding aborbency. To boost the absorbency of your baby’s diaper, just lay the doubler inside the diaper with the soft, stay-dry surface next to your baby’s skin. Do not stuff inside a pocket diaper, this may cause your diaper to leak. Made from 1 layer of stay-dry fleece and 2 layers of microfiber terry. 6 liners per package. The Stay-Dry Doubler measures 12 x 5.5 inches.