The Yonex Astrox 100ZZ features a modified version of the rotational generator system/hybrid functions, which represents the core technology in the Yonex Astrox series. 

This means that the racquet would deliver a very powerful smash as a head heavy racquet would, whilst being able to better counter balance the racquet weight via a redesigned weight distribution system. The end result is you'll never feel the racquet's head weight when you're not swinging the racquet. You'll also be able to recover much quicker after each shot.