Multi-filament

Reels typically contain hundreds of feet of string (enough to restring several rackets). Whereas sets usually contain about 38 to 40 feet of string (enough to restring a single racquet).

Generally, a 660 ft reel will string approximately 18 racquets. On a per unit length basis, it costs less to package, transport and handle reels versus sets. Golden Set passes these savings on to you: for a given string type, the per unit length cost is less for reels than sets.