10 Pack YoYoFactory 100% Polyester Yo-Yo Replacement Strings. Having spare string on hand is an essential part of Yo-Yoing. Like any sport, your equipment needs maintenance. YoYoFactory Modern Performance 100% Polyester string is designed to last longer and play smoother than traditional cotton string.
YoYo Shop also have 25 packs of YoYoFactory 100% Polyester Strings available.