![This full bed of poly has 40 hours of tennis on it. It was completely black and now it is turning white? I haven't noticed a change in performance but is it This full bed of poly has 40 hours of tennis on it. It was completely black and now it is turning white? I haven't noticed a change in performance but is it](https://preview.redd.it/this-full-bed-of-poly-has-40-hours-of-tennis-on-it-it-was-v0-n7xu0wt3mii91.jpg?auto=webp&s=46b83f88274bdb825551cf280c6a75b4b5150067)
This full bed of poly has 40 hours of tennis on it. It was completely black and now it is turning white? I haven't noticed a change in performance but is it
![Amazon.com : Luxilon Big Banger ALU Power Feel 17 Gauge - 120 Polyester ( Poly) Tennis Racquet String 2-Pack (2 Sets Per Order) : Sports & Outdoors Amazon.com : Luxilon Big Banger ALU Power Feel 17 Gauge - 120 Polyester ( Poly) Tennis Racquet String 2-Pack (2 Sets Per Order) : Sports & Outdoors](https://m.media-amazon.com/images/I/51K0QJtGjaL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : Luxilon Big Banger ALU Power Feel 17 Gauge - 120 Polyester ( Poly) Tennis Racquet String 2-Pack (2 Sets Per Order) : Sports & Outdoors
![Amazon.com : Solinco "Heaven Strings Revolution 6-Sided Poly (Polyester) 16L Gauge / 1.25mm Tennis Racquet String Sets 6-Pack (6 Sets Per Order) - Best for Spin, Control, and Durability : Sports & Outdoors Amazon.com : Solinco "Heaven Strings Revolution 6-Sided Poly (Polyester) 16L Gauge / 1.25mm Tennis Racquet String Sets 6-Pack (6 Sets Per Order) - Best for Spin, Control, and Durability : Sports & Outdoors](https://m.media-amazon.com/images/I/51dJZknW5-L._AC_UF1000,1000_QL80_.jpg)