D'Addario GH-RS Acoustic Replacement Sponge 3-Pack

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.