@TWlegion@NUCLRGOLF@SnobbyScheffler Actually, it is from the steering wheel of the golf cart. Creating rub marks on smooth fabric and sometimes "outlines" of things in the pocket that make contact with the lower part of the steering wheel. Tees, divot tools, golf balls.
@georgiaballgolf Not legal in competitions. The old Vaseline trick to reduce spin. It appears this young lady is getting paid to promote this product. The evidence is on the “birdie” putt. Notice the video is cut and she is re-putting from a different location.