Yonex Aerobite Boost Badminton String 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. Color(s): Dark Gray / Yellow, Black / RedGauge: mains - 0.72 mm; crosses - 0.61 mmCore: mains - High-Intensity Nylon Multifilament, With Vectran™, crosses - High-Intensity Nylon MultifilamentOuter: mains - Special Braided High Polymer Nylon, Oval Shaped, crosses - Special Braided High Polymer NylonCoating: Mains - Polyurethane Coating Features :