Behind the creation of Kerly Music's Earthtones™ lies grit, passion and warmth. Acoustic guitar is where the soul lies and we have developed a string that targets this expressive, artistic approach. Earthtones™ are conditioned with the same revolutionary cryogenic process as our Kerly Kues™ electric strings. Thermal Cycling increases durability and dramtically reduces wear. Strength, sound and string life are enhanced.