The new GF System ligature has the quick fit, none slip properties of other fabric ligatures but the matrial is designed to allow the reed to vibrate freely with less dampening. This means that you will get a more harmoinically rich, clearer and fuller sound with this lig as opposed to the darker warmer sound of other fabric ligatures.
BSS = Standard
BGG = Gold-Line
All 'System' ligatures are BGG (Gold-Line)