Esembly reusable cloth diapers are made up of two parts: an absorbent Inner and a waterproof Outer (sold separately). Esembly Inners are made of super soft and thirsty certified organic cotton. Inners are designed with a unique butterfly shaped core to maximize absorbency while still allowing water and detergent to access all layers of the diaper for a deep and thorough cleaning and efficient drying. Esembly Inners come in two sizes and are made to grow with your baby. The waist snaps allow for adjustments to accommodate expanding bellies, while the rippled core and stretchy elastic at the legs will expand as your babe gets taller. Inners are designed to be worn with an Esembly Outer (sold separately) for waterproofing and containment. If cloth diapering full-time, you’ll want to have 24 Inners and 6 Outers. Inners require laundering after each use, whereas Outers can be used multiple times before washing.