This string is part of Luxilon's ECO range of tennis strings. Luxilon ECO strings are made from 100% recycled materials, earning them the label of 'sustainable'. Additionally, due to its 5-sided structure, this firmer monofilament string is particularly effective at imparting spin to the ball. As a result, the Luxilon ECO Spin is an appealing option for players seeking a sustainable, firmer monofilament string that combines spin and control. This set contains 12 meters of the Luxilon ECO Spin, sufficient for one tennis racket.