In a sense, this shader is very similar to the plain fabric material, except that the textures have a larger pattern and rougher weave.
Use a falloff map in the diffuse slot to make the threads look a little bit fuzzy and give it a ‘fabric’ look. The first color is a canvas texture, and second color is the same texture, mixed with a light grey color at 50%. The falloff curve is adjusted to bring the fuzziness closer to the edges.
Weak, blurry reflections are present, which do not contribute much to the material, as the surface is very diffused from all the micro fibers. The map is simply a low-contrast, grayscale version of the Diffuse texture.
A good normal map in the bump slot to simulate the shape of the surface, combined with a wrinkle map to make it a bit wrinkled and uneven, makes it look more natural. You can use a different map for wrinkles or adjust the intensity, depending on the look you are going for.
