GHS Thin Core Phosphor Bronze acoustic guitar strings combine low tension, superior playability with balanced tone! Wound over a round core - these strings bring a warm tone to your guitar with plenty of clarity and definition. The low tension (due to the smaller core diameter) is a joy under the fingers and perfect for those guitars where tension can be a concern. Round Core Makes it EASY! The Round Core provides a softer feel. This is great for fingering hard chords and great for string bending as well. The lighter tension is easy on the fingers so you can play for a longer time.