The overcoat is an outdoor fashionwear garment worn strictly outdoors. Depending on the season, there are different types of overcoats. The most common is the winter overcoat which is ideal in the cold winter months. Lighter transition coats are preferred in spring and autumn. Overcoats can also vary depending on their cut and material. Styles can range from an oversize trench coat worn over a classical blazer to a traditional duffel coat. A warm coat is usually made of wool or quilted material, while lighter coats are made with gabardine, cotton or modern synthetic fibres.