A rain boot, also known as a GALOSH, is a type of waterproof footwear that is designed to protect the feet and legs from rain and wet conditions. It typically consists of a rubber or plastic outer shell with a fabric lining and a sole made of rubber or other waterproof material. The term 'GALOSH' comes from the French word for 'OVERCOAT, ' which is fitting since the boots are meant to be worn over regular shoes.