Yonex POLYTOUR FIRE is a polyester monofilament for players seeking greater pace and spin from a committed swing. It is aimed at medium to fast racquet-head speeds.
SIF (Silicone Infused Filament) technology incorporates silicone oil into the string. Lower friction between strings supports snapback and the responsive power and spin highlighted by Yonex.
This version has a 1.20 mm gauge (17) and a length of 12 m in the official Red colourway. The set length is intended for individual racquet stringing.