Ernie Ball's titanium coated 2160 Slinky Acoustic strings are stronger and longer-lasting than traditional strings--either coated and uncoated strings. That's thanks in part to an exclusive protective coating on both the wrap wire and the plain strings as well as a patented winding of titanium wire around the lock twist of the ball end. Staying true to Ernie Ball's heritage of superb craftsmanship and sound quality, Slinky Acoustic Guitar Strings are made with the finest and freshest raw materials, resulting in a crisp ringing sound with pleasing overtones. Enhancing the inherent string quality and freshness is Ernie Ball's string packaging. Produced and now hermetically sealed into their packages, Slinky acoustic guitar strings are exposed to minimal moisture and humidity from factory to retailer--insuring that all Ernie Ball strings are as fresh upon opening as they were the day they were made.