Yonex’s second hybrid string combo. The new AEROBITE Boost applies heavy spin for decisive cut smashes or a solid touch for hairpins that drop straight down. A hybrid multifilament string engineered for maximum control without sacrificing repulsion. The vertical strings are made of Vectran(tm), a super fiber more than twice as powerful as nylon. Combined with a super-thin cross string, this hybrid setup retains ultimate control and repulsion.