This is a basic one size fitted diaper. Like all Mother-Ease diapers it is made to last with excellent absorbency. This tried and true diaper is one of Mother-Ease's best sellers. Use with a cover such as the Rikki Wrap or Air Flow Cover. Material options include bamboo, stay dry, unbleached cotton, organic cotton, and a variety of colours. Stay dry keeps moisture away from your baby's skin better than other materials while bamboo is natures own super soft and highly absorbent wonder material.