YONEX Poly Tour Fire 16L (1.25mm) Tennis String 200m Reel - Red

• Impressive snapback and responsiveness from SIF technology* (Silicone Infused Filament)
  
• For players with medium-to-fast swing speeds looking for added power and spin

Athletes:

Tomas Machac, Elena Rybakina, Anhelina Kalinina, Diana Shnaider.

Technology:

1. SIF

This new Silicone oil Infused Filament (SIF) technology--monofilament infused with Silicone oil--allows big hitters to experience ultimate spin from intense snapback speeds. Greater snapback produces a powerful spin. SIF Technology with unique pentagonal structure allows the string to move faster than conventional models, increasing spin.