Rule towel/James Warren towel
Rule 14 towel: The invisibrush golf towel (grey) has two textures to facilitate not only cleaning your clubs, but polishing your ball. Trust me, once you've tried Rule 14 (also available in white), you will be impressed with how much efficiency you can get out of a towel.
James Warren Navy Towel: The quality is so high you can use it for more than your golf clubs. Super luxurious. (Also available in linen and white).