Luxilon's Eco Spin is a durable polyester string designed for ultimate precision and tension maintenance. The pentagon string shape offers great spin potential, grabbing the ball on contact and adding devastating arc to its flight. If you're looking for additional control to keep your shots in the court and want a sustainable choice, Eco Spin delivers, helping ambitious players take their game to the next level. Not only is this string made of 100% recycled materials, but it is also biodegradable.