Nittaku describes the C-1 as an offensive rubber, which provides high speed, ideal arc, and powerful top spin. The concept of C-1 is “catch-first” and it features a “Tension Spin topsheet and Soft Strong sponge”. The Fastarc C-1 was designed to integrate the speed performance of S-1 and the spin performance of G-1 into one balanced rubber that has excellent control.