The difference betweenElixir coating flavors is found in the tone and feel of the strings. NanoWeb® coated strings sound and feel like uncoated strings – they are bright and lively, and the coating is so micro thin that you can barely tell it’s there. PolyWeb® coated strings have a balanced tone and smooth response – they sound like strings that have been played in. In addition, PolyWeb® coated strings feel comfortably smooth and help reduce finger squeak.