D'Addario Planet Waves Humidipak Automatic Humidity Control System

sku: PWHCS
A two-way humidity control that maintains a constant 45-50% relative humidity level, eliminating the guesswork of when to refill the humidifier, drips or leakage, or manual adjustments based on seasonal changes, geographic locations, temperature, or other factors. The system includes one headstock pouch (holding one Humidipak packet), and one soundhole pouch (holding two Humidipak packets). Simply place the Humidipak packets with the included pouches into your instrument case, close the lid, and that's it!