Developed with Taylor for use on the GS Mini bass these acoustic bass strings feature EXP coated Phosphor Bronze wrap wire over multi-filament cores to deliver long-lasting tone, projection, and playability. D'Addario EXPs are the most natural-sounding, longest-lasting coated strings available. EXP coated technology starts with the highest quality wrap wire materials, precision drawn and micro coated on our advanced proprietary machinery. Strings are then wound normally, delivering tone and feel identical to D'Addario world renowned acoustic bass strings, with a minimum of 4 times more life. You won't believe they are coated!