It is a type of material that blends polyester and wool fibers together to create a fabric that exhibits the properties of both materials. When these two fibers are blended together, they create a fabric that is both durable and comfortable. The polyester in the blend adds strength and resiliency to the fabric, while the wool provides warmth and softness. This combination makes it a great choice for a wide range of clothing items, including suits, jackets, and pants.