Trench Coats Fabrics. We will ensure you are aware and decide on the best fabric, based on your design as we offer you Cotton, Leather, Cotton Drill and Poplin, to Wool Gabardine, Cotton Polyester, Polyester, Nylon, Denim and Gore-Tex which is for waterproofing. In colours such as camel or khaki, sand, stone, navy blue and black.