The slim aerodynamic frame geometry in the racquet frame makes it more maneuverable and allow for faster speeds. The shaft is robust with a stable cross section, with provides maximum stiffness in the area with the highest blending moment.
All of this means use of less energy when hitting the ball, which allows you to go all the way in those long set matches.
There are two types of the instinct. The MP and the S with the s having a 660 cm2 compared to 645 cm2 for the MP. The S is also 30 grams lighter checking in at 270g.