Herco's Guardfather humidifying system is your one-stop shop for preventing all of the unfortunate warps, cracks, and shrinkage that can occur in less-than-ideal humidity conditions. This simple-to-use container uses clay to hold in moisture and gradually release it into your instrument. Just pop the top, set the Guardfather in water for five minutes, seal it shut, and set it in your guitar case — it's that simple! Herco's Guardfather humidifying system can be used with violins, cellos, clarinets, and a wide variety of wooden instruments, something multi-instrumentalists appreciate when keeping their gear in tip-top shape. Your acoustic instruments have served you well over the years — keep them all in perfect playing form with the Herco Guardfather Humidifier HE360!