Ashaway SuperNick XL Titanium Squash Squash String Packages : A multifilament core in Ashaway SuperNick XL Titanium Squash string is designed with a double braided jacket and titanium compound added to the nylon resin wear layer for an excellent combination of playability and durability. The multifilament construction provides a gut like feel. A textured surface provides optimum ball control. Titanium additive in the nylon resin wear layer enhances string wear and power. Made in the U.S.A..