D'Addario Humidipak Restore Two-Way Humidity Conditioning Packets, 3-Pack

Ensuring that your instrument and case are properly humidified before using the Humidipak Maintain System is essential in order to receive the maximum benefits and longevity of the product. The D'Addario Humidipak Restore Kit allows you to safely restore an instrument and case that is in a known dry condition or has previously not been humidified to the proper humidity level without any danger of over humidification.

Your Guitar Still Thinks It's a Tree. Hydrate It.
Keeping your instrument safe and playable has never been easier, thanks to D'Addario Humidipak. Using Boveda's two-way humidity control technology, Humidipak automatically adds or depletes moisture to maintain the ideal humidity level of 45%-55% RH inside your instrument case, and eliminates the guesswork and anxiety of maintaining your instrument.

Two-Way Humidification
Two-way humidification maintains a constant 45%-50% relative humidity level within the instrument's case by automatically dispensing or absorbing purified water vapor as needed.