A diaper cover is a waterproof or water-resistant outer layer designed to be worn over cloth diapers. Its primary purpose is to prevent leaks and keep clothing dry while allowing the cloth diaper underneath to absorb moisture. Diaper covers come in various materials, such as PUL (polyurethane laminate) or wool, and can be fastened with snaps, Velcro, or elastic. These covers are often adjustable to fit different sizes and can be reused multiple times, making them a cost-effective option for parents. They are available in various colors and patterns, allowing for personalization while ensuring functionality in diapering routines.