He always wears his galoshes on rainy days to keep his leather shoes dry.

galoshes 是名词，指"橡胶套鞋"或"雨鞋"，通常指套在普通鞋子外面用来防水的橡胶鞋套。这个词来自法语"galoche"，原指一种木底鞋，后来演变为指防水鞋套。