Silver wound on metal core.
The silver winding allows the string to be slightly thinner and produces a rounder, more gut like sound.
6 out of 6 found the following review helpful
Pros: It makes a full rich sound from the start and blends well with G Silver sound and Larson A & D. The fact that it does not need to be played in is a big bonus.
Cons: There are no cons.
Other: I have tried other strings on recommendation over, but they never match up to the the Silver Sound.