Do you wish the strings on your acoustic guitar lasted longer? XT by D'Addario seeks to grant your wish. These acoustic guitar strings are made from D'Addario's wildly popular phosphor bronze alloy and provide the durability of a coated string with the feel of a non-coated string. The secret is D'Addario's "fusion twist" technology and proprietary extended lifespan treatment that applies their thinnest and most durable coating to each string to prevent corrosion without interfering with their natural feel. XT strings provide a bold sound and incredible tuning stability that will last through multiple sweaty gigs. If you want your acoustic to sound better than ever before, try out XT by D'Addario.