The Voltric i-Force badminton racket is designed based on Yonex most popular and best-seller racket, the Voltric Z-Force. The racket does not have stiff shaft and the advanced material such as NanopremeTM, but it does the Z aerodynamic head shape and have pretty good swing feel similar to the Z-Force. The i-Force overall weight is much lighter at 5U ( average weight of 78 grams ) compared to the Z-Force at 4U ( average weight of 83 grams ) and, yet, offer a head heavy swing weight close to the Voltric 70 & 80. These combine specifications make the Voltric i-Force much easier racket to play while offering pretty good power close to the popular Z-Force.LI Ning is world’s renowned firm in the field of sports equipment design and development. In the area of Badminton, Li Ning has developed world class racket and badminton accessories to support the top class badminton players. World number 1 Lin Dan is endorsed by Li Ning , in fact most of the top seeded badminton players are endorsed by Li Ning Badminton team. Li Ning shoes are very popular among the badminton player because of its excellent bounce, cushioning, shock absorption and breathability. As a leader in the worldwide market, their name is a trusted brand by numerous badminton stars. Millions of loyal customers prefer their products as far as badminton is concerned.