Our listings are different from the rest, because here at Delgado guitars every item we sell has been hand selected by Manuel Delgado himself. With over 95 years in business, you can trust that the products we sell are a cut above the rest.
D'Addario's website says this:
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.