Constructed with a special material known as FORGED FIBER, the Yonex EXBOLT 68 Badminton String offers a unique combination of durability and quick repulsion, similar to the EXBOLT 63 and EXBOLT 65. The common issue of low durability normally associated with thinner string  was addressed by strengthening the molecular bonds of the fibers. The shape of the FORGED FIBER has also been altered to an oval pattern in the new EXBOLT 68, limiting fiber deformation upon impact and increasing smash power. By utilizing a highly durable material, the thickness of the string is reduced, allowing for improved repulsion without sacrificing durability. The result is a thinner gauge string that provides a superior repulsive feel while maintaining the durability of thicker strings.