Strings configured for use in sports racquets (400) and musical instruments are fabricated as a plastic core wrapped with one or more filaments (101) of plastic. The strings are coated with a material composite that includes rigid nanoparticles, and lubricated nylon. The rigid nanoparticles may include clay or carbon nanotubes. The strings are coated with the material composite using various processes that result in a coating thickness of between 1 and 200 µm. The material composite may further include impact modifiers. The strings experience extended life due to reduced frictional wear and improved mechanical properties.