Babolat's top of the line Natural Gut in a thin, spin responsive 17 gauge. Consistent winner of the USRSA String Survey for Playability. Used by top touring pros and players who demand ultimate feel and control. VS Natural Team Gut is constructed with a tighter gauge tolerance than any previous Babolat VS Natural Gut offering. Includes Thermogut Technology - a process of high temperature finishing that increases the cohesion of the fibers down to the core of the string. Now comes with BT7 technology which is a new layering structure, increasing durability by 15%.