Kumpoo Soul War hybrid has been developed to third generation. This series is patent registered for its special shaft which has different stiffness from both sides. It is exclusive technology of Kumpoo and cannot be found from anywhere else. Compare to applying different cross-section to frames, shaft brings much more obvious effects of both forehand and backhand plays. The stiffer side of the shaft brings more power and speed for forehand plays, which is great for attacking. While less stiffer side generates more elasticity and control, which helps for defense.
Hybrid P365 applies box and acro cross-section for different sides of the frame, which brings high stability drop shots and less wind resistance shots from two sides of the frame.