Cloth diaper liners are thin, absorbent layers placed inside cloth diapers to enhance their functionality. They help to keep the baby's skin dry by drawing moisture away from it, making diaper changes easier and more hygienic. Liners can be made from various materials, including bamboo, microfiber, or cotton. These liners can be either reusable or disposable. Reusable liners are washable and can be used multiple times, while disposable liners are designed for single use and can be thrown away after soiling. Using liners can extend the life of cloth diapers and simplify the cleaning process.