The new Pro Kennex Kinetic Q15 features a larger sweet spot for increased comfort and forgiveness This is accomplished by changing the location of the Kinetic Mass chambers within the frame towards the four shoulder areas of the head The advantage of placing the additional weight in these areas is an expanded sweetspot as well as added stability Spiral Tech Carbon offers additional flexibility to the Kinetic Q15 for even more of the comfort that the Kinetic line is known for The specialtreated spiral carbon offers improved dampening properties while the high modulus graphite provides strength and needed rigidity The moveable mass inside the Kinetic chambers helps to not only add power but more important to largely dissipate shock for incredible comfort The open string pattern provides plenty of spin and power with nice whippy feel