D'Addario, in collaboration with Humidipak, brings you the first two-way humidity control that maintains a constant 45% relative humidity level. The patented D'Addario Humidipak® completely eliminates all the guesswork and anxiety of maintaining your instrument's proper humidity level. No more guessing if or when to refill the humidifier and worrying about drips or mess. No more manual adjustments based on seasonal changes, geographic locations, temperature, or other factors. Unlike all refillable humidifiers, the Humidipak® provides true “two-way” purified humidity control since it adds or depletes moisture only as needed to maintain 45% RH (relative humidity) — the ideal climate for wooden instruments.

This D'Addario Humidipak Maintain humidity kit is meant for regulation to upkeep proper humidity of your instrument. If you are looking to RESTORE your instrument to its proper humidity, please use the D'Addario Humidipak Restore humidity kit.