D'Addario Humidipak Maintain Replacement Two-Way Humidity Control System, 3-Pack

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 it's case before using the Humidipak Maintain System. Using Maintain packets on a dry instrument / case will greatly shorten the lifespan of the packets.Your Guitar Still Thinks It's a Tree. Hydrate ItKeeping your instrument safe and playable has never been easier, thanks to D'Addario Humidipak. Using Boveda's two-way humidity control technology, Humidipak automatically adds or depletes moisture to maintain the ideal humidity level of 45%-55% RH inside your instrument case, and eliminates the guesswork and anxiety of maintaining your instrument.Hydration For Your GuitarTwo-Way HumidificationTwo-Way Humidification maintains a constant 45% - 50% relative humidity level within the instrument's case by automatically dispensing or absorbing purified water vapour as needed.What is Two-Way Humidity Control?Two-way humidity control works by continually responding to the outside temperature and climate by adding or removing humidity as needed to maintain a relative humidity inside the Reed Vitalizer bag.