German engineered new-generation soft co-polyester monofilament string. Made for powerful hitters ans string breakers.Allows you to take huge, powerful swings and the ball still comes down in the court.
This is the type of string many pros are using today. It plays and feels like a powerful synthetic gut, but lasts so much longer.
The durability is top-notch, the best ever tested by the USRSA other than kevlar (5/2004 test).
Big Hitter also tested #1 in resistence to movement, so your strings won't slide, increasing power and string life.