Technology : Box Frame : A box Frame Structure with increased rigidity that provides exceptionally solid feel. Aerogroove : Extended Groove design on the frame reduces air resistance and improves racquet face stability. Quad Booster : Increase Rigidity on 4 corners of the frame provides racquet face stability and exceptional bite. Cross Flexible Frame : Mizuno Distinctive technology for optimising the rigidity distribution of the frame. The improved frame which is designed to bend towards the inner side provides adde d bite to the shuttle. Impact Navigation : Increased rigidity on the joint improves racket face stability and increase bite. Mizuno Badminton