D'Addario Humidipak Automatic Humidity Control System

D'Addario Humidipak is the only maintenance-free, two-way humidity control system for guitar. It automatically maintains the optimal 45%-50% relative humidity level within your instrument case, eliminating the guesswork and potential mess related to refilling a humidifier. No more manual adjustments based on seasonal changes, geographic locations, temperature, or other factors.

• Comes with 3 packets and a soft mesh pouch that will not harm your instrument's finish
• Packets last between 2-6 months and should always be kept in a sealed case
• Replace firm packets with the Humidipak Replacement Pack.