C37DC49C-F25F-46D8-A1C8-2F6F49D55BF4 Created with sketchtool. FIND A STORE +
US Dollars USD
Or Players Circle Points
CAN Dollars
GB Pounds
US Dollars


Spend 35.0 more for FREE Standard Shipping



Replacement 24-Pack PW-HPRP-24

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. Note: Humidipak is designed for restoring and maintaining instrument humidity. This product is not intended for dehumidification in high humidity environments. If Your instrument has not been previously humidified or is in a known dry condition, it is recommended to use Humidipak Restore to safely reestablish the proper humidity level to your instrument and its case before using the Humidipak Maintain System. Using Maintain packets on a dry instrument / case will greatly shorten the lifespan of the packets.

Proudly made in the USA.

$93.99 Or 12,800 PTS
Players Circle Code Value: 1,600 Points
Product Specs
Product Features
String Tension Chart
Additional Resources


  • What is the #1 cause of all instrument repairs?

    Lack of humidity is the leading cause of all instrument repairs. It is essential to humidify all wooden instruments.

  • How do I recognize symptoms of a dry instrument?

    A dry instrument can be recognized by a number of symptoms. Sharp fret ends, neck bow, sunken top, lifted bridge, lower string height, notes starting to buzz, cracking of the neck and/or body, or change in tone of the instrument.

  • Which Humidipak do I need?

    If your instrument is not already too dry, Humidipak Maintain will maintain a constant relative humidity level inside your case. If your instrument is dry and needs to first be brought back to the proper relative humidity level, use Humidipak Restore. If you're already in a high-humidity environment and need to lower the relative humidity of your instrument, use Humidipak Absorb.

  • How often should I replace my Humidipak?

    Humidipaks typically last between two to six months for an instrument that is already preconditioned to 45%-50% relative humidity. They should be replaced when the packets begin to feel hard or every six months maximum, whichever comes first.

  • What temperature should I keep the room my instrument is stored in?

    It's important to maintain a consistent temperature in the room where your instruments are stored. Anywhere in the range of 70-76 degrees Fahrenheit is ideal.



promo pc guitar
Players Circle

Become a Players Circle member for free today to start earning points towards free D'Addario gear and merchandise. 

Join Us


Member log in

The 501c3 non-profit


dual promo foundation
foundation logo

The D'Addario Foundation is powering change by bringing music instruction to underserved communities and providing children with inspiration and creativity that lifts their confidence.

Learn more

What you entered
Suggested Address
Are you sure you want to delete this address?
Once deleted, you'll have to re-enter it to use it again in the future.
Saved Address: