Oasis GPX Florocarbon Ukulele Strings-Warm-High G
GPXTM treble strings are made from fluorocarbon monofilament (polyvinylidene fluoride/PVDF). Some people call them "carbon trebles" thinking that they are made from carbon fiber. This is not the situation. The carbon reference is to fluorocarbon rather than carbon fiber. Most classical guitar strings are made from nylon. PVDF has 80% greater density than nylon, so the strings can be made much thinner than nylon and still maintain similar tension to nylon.