|Iso-Speed Professional 17 is composed of a blend of polyolefins (polyolefin is the same material used in the base of snow ski construction); narrow pre-stretched ribbons are twisted under tension and heat, then welded together. Through a unique patented system, each set of string is factory pre-stretched and locked under tension on an industry exclusive 40ft. reel. Iso-Speed Professional 17 retains all the characteristics of Iso-Speed Control 16g. but offers an option to players seeking additional "pop"and/or spin enhancement.
Iso-Speed Professional is very close in construction and feel to the now discontinued Head Pro Fibre string, which was also 100% polyolefin.