More about FORTEN Polyamid Composites: A Polyamid Composite string is a synthetic gut constructed using nylon filaments and fibers. Nylon strings offer a softer, more natural "feel" than the strings made from more durable materials such as polyester and Aramid fiber strings. Nylon strings are still the core of the racquet sports industry. They play well and are both durable and cost effective. FORTEN has produced millions of sets of Nylon strings over the last two decades and is considered a pioneer in nylon string development. FORTEN's expert manufacturing processes have enhance nylon strings' performance so that the strings emulate the highly desirable characteristics of natural gut without the high cost.