Ernie Ball 80/20 Everlast Coated Acoustic Strings utilise a breakthrough nanotreatment which enhances the metal surfaces to repel moisture and oils. One thousand times thinner than any other acoustic coating on the market, Everlast strings give longer life without compromising tone or feel. Ernie Balls new Everlast nanotechnology is applied to both the inner hex core and outer wrap wire, providing ultimate protection from contaminates such as; dirt, grime, acid, sweat, and moisture. Available in 80/20 and Phosphor Bronze alloys, this new acoustic line is available