D'Addario Humidipak System Replacement Packets 3-pack

The D'Addario Humidipak Replacement Pack keeps your two-way humidity control system running without interruption. When the Humidipak packs become firm to the touch, simply swap them out with these three fresh replacements to maintain the optimal 45–50% relative humidity level in your instrument case. Humidipaks typically last between 2 and 6 months depending on your environment, and should always be stored in a sealed hard-shell case when in use.