D'Addario Acoustic Guitar Humidifier Replacement Sponges, 3 Pack

3 sponge replacement pack for the best-selling D'Addario Acoustic Guitar Soundhole Humidifier makes it easy to properly and safely humidify your guitar. The Humidifier hangs safely in the Soundhole suspended by the instrument's strings so it never touches the body of the instrument. The humidifier releases the moisture slowly and evenly, keeping your guitar perfectly humidified. For use with D'Addario Acoustic guitar humidifier and Small Instrument Humidifier.