Final answer:
The fabric is gabardine, a durable steep-pitch twill textile known for its diagonal ribs, wrinkle resistance, and smooth finish, often used for formal clothing.
Step-by-step explanation:
The type of fabric that is a steep-pitch twill woven with more warp than filling yarns, creating diagonal ribs with fine lustrous yarns, is known as gabardine. Gabardine is a durable, tightly woven fabric that is also resistant to wrinkles and has a smooth finish. It is often used in the manufacturing of suits, overcoats, trousers, uniforms, windbreakers, and other apparel that requires a fabric that can hold a sharp crease and retain its shape.