Strum the same set favored by Rock & Roll legend, Phil Everly of the Everly Brothers. No other coated strings on the market met with his exacting standards and so his memory lives on in phosphor bronze through Everly Acoustic Sessions. Every set is made to order, made to endure, made to rock. All Cleartone acoustic guitar strings are made in house from 100% premium U.S. sourced materials. We do not recommend using string cleaners on Cleartone Strings. Simply wipe down strings after use with a clean dry cloth.