What are the different types of string available? And if possible, the properties associated with the string. I know 2 basic types that exist. Gut and Syn Gut which is basically nylon. Gut is ultimate playability but is expensive, while syn gut doesn't quite cut it but is extremely cost efficient. However, everyone likes to talk about poly, multifilament etc. Mainly, however, people have been mentioning Luxilon brand strings and thier crazy stiffness that requires you to lower tension and whatnot. What are they classified as?