The Yonex BG Exbolt 63 badminton string is built for quick repulsion in an ultra-thin gauge. At just 0.63mm, it is one of Yonex’s thinnest strings, which gives fast energy return for quick drives and a crisp hitting sound. The standout is its Forged Fiber outer layer, a material built with stronger molecular bonds that makes this thin string around 24% more durable than conventional thin-gauge strings. With a high-intensity nylon multifilament core, it delivers deep, fast shots for an attacking game. This string suits intermediate to advanced players who want speed and repulsion without the short life of typical thin strings. Colour may vary.