When Nadal and Francesca Schiavone swept the men’s and women’s French Open titles last June playing with Babolat polyester strings, the repercussions of their success impacted already popular ...

Wicked spin, radar control, tough as nails—the virtues of polyester string are well documented. With such qualities, it’s no wonder the popularity of polys has grown at every level of the game.

The company converts used tennis strings into recycled polyester suitable for clothing manufacturing. COURTESY OF JAKOB ESTEROWITZ Orobor collects used tennis racket strings and recycles them into ...