Whether you live in a hot, dry desert area or in the freezing arctic zone, the scientifically tested DAMPITS humidifier will protect your instrument against damage. The Dampit Humidifier The original Dampit humidifier, complete with its own humidity gauge. Ideal for fiddles and mandolins. Superior soft rubber sleeve encloses a open cell sponge. Simply soak in water, wipe off excess and insert in f-hole. Don't let your instrument suffer from dry weather - get a DAMPIT today!