Yonex String Exbolt 63 0.63mm

I absolutely love this string because of the ultra fast repulsion, it's bite on the shuttlecock and metallic ping it gives off. Works really well for quick attacks in a doubles game.

From the reviews, it's been said that the 63 is the least durable in the Exbolt line considering the thing string. However, I haven't broken any yet after a few months, despite playing twice a week at 1.5 hours each session. In saying that, I do cycle through 4 rackets though.