Procedural Felt Shader
Important.
Optimized to work with UV coordinates. Make sure you have UVs on your mesh and the UV vector coordinates are connected to the input. It will work with object and generated coordinates but be careful with curved surfaces.
Directions
The easiest way to append this to your scene is to copy (CTR+C) an object from the blend file and paste (CTR+P) to your scene. Which should bring along the material.
Pro Tip.
Add a bit of hair to simulate fuzz