Zo Tour is designed for players who prefer maximum control, a crisp firm feel and exceptional durability. Zo Tour features a new and unique construction that consists of six polyester monofilaments surrounded by the High Energy Polyester material. Engineered for players who prefer maximum control, a crisp firm feel and exceptional durability. Zo Tour features a new and unique construction that is made of six PET monofilaments surrounded by a high enery polyester core.