D’Addario Folk Nylon strings bring the alluring sound of nylon to all types of acoustic guitars. Folk Nylon sets feature ball ends, making them compatible with other, non-classical acoustic guitars. Combining silver-wound nylon core basses with black nylon trebles, Folk Nylon guitar strings bring warm, mellow, nylon tone to any acoustic. This Normal Tension set is our best-selling tension, preferred for the balance of rich tone, comfortable feel, and dynamic projection.