The term "Gillet" is a French word that refers to a sleeveless jacket. In English, it is commonly used for a particular type of body warmer that lacks buttons or a zip. This type of jacket was initially designed for fishermen, hunters, and other outdoor enthusiasts. However, it has since become stylish, and fashion-conscious individuals now wear it regularly. Synonyms for Gillet include bodywarmer, vest, waistcoat, and sleeveless jacket. These terms are used interchangeably to refer to the same type of jacket, and they all share the common characteristic of having no sleeves. Gillets come in various shapes and sizes and can be made from different materials, including wool, cotton, and leather.