The All New Wilson Natural Gut Gets An Upgrade In More Ways Than One. Now With An Even Better Price And A Slightly Firmer Feel These Strings Still Remain The Rolls Royce Of The Tennis String Market. Although The Strings Are Slightly Firmer, Don`T Fret As They Are Still Exceptionally Comfortable And Perfect For Players With Arm Issues. Made From Cow Intestines, This String Takes Significant Time And Resources To Produce, Providing Players With The Utmost In Feel And Playability. Great By Itself Or In A Hybrid Application, Wilson Natural Gut Features A Moisture Resistant, Long-Life Coating To Protect Your Investment. Check Out This String And Other Serena Gear In Our Blog: Serena Williams Heats Up The Court For The Us Open!.