D'Addario GHP Acoustic Guitar Humidifier Pro Replacement Sponges

The D'Addario GHP Acoustic Guitar Humidifier Pro Replacement Sponges are designed specifically for use with the D’Addario Humidifier Pro system, helping maintain proper humidity levels inside your acoustic guitar case or body. Made from a specialized hydrophilic material that holds up to 12 times its dry weight in water, these replacement sponges provide longer-lasting moisture retention between refills while helping protect instruments from dryness-related cracking, shrinking, and warping. Easy to install and maintain, they’re an essential accessory for ongoing acoustic guitar care.