D'addario Humidipak Standard Refill Packette, 3 pack

This all new, reformulated, patented; two-way; humidification system maintains 45-50% relative humidity which eliminates all maintenance and guesswork. this system is recommended by taylor guitars and others for maintaining the stability and playability of your instrument.

* Automatically maintains 45-50% relative humidity in a closed environment (i.e. guitar case) * No need to add water and constantly monitor * Recommended by many top guitar companies and luthiers PW-HPRP-03