Luxilon Natural Gut brings a new innovation to the oldest string in tennis. A unique coating and organic raw material provides the ultimate touch. Engineered to work in combination with Luxilon Monofilament strings, Luxilon Natural Gut is built to elevate your game to the highest level. For those looking for a little extra durability, Luxilon recommends hybrid stringing with Luxilon Natural Gut and Luxilon Monofilament strings such as ALU Power & 4G.