I have always liked the sound and quality of Martin strings, but I also hate changing strings so I have tried a fair few different brands looking for something that lasts a little longer. I personally don't like the feel of coated strings for fingerstyle, and they look nasty when the coating starts flaking off. These strings don't have a coating, Martin have added a treatment to the metal which keeps them sounding great for longer, whilst looking and feeling like regulars strings. Perfect.