D'Addario brings you Boveda's patented technology as part of our instrument care line. The Two-Way Humidification System (formerly 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. Unlike refillable humidifiers, this system provides true “two-way” purified humidity control by adding and removing moisture on demand. No more manual adjustments based on seasonal changes, geographic locations, temperature, or other factors. The Two-Way Humidification System comes with 3 Humidipaks and a soft mesh pouch that will not harm your instrument's finish. These packets last between 2 and 6 months and should always be kept in a sealed environment like a hard-shell case. Once the packets become firm, discard and replace using the 3 refills that come in the D'Addario Two-Way Humidification Replacement Pack (PW-HPRP-03). 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.

The first two-way humidity control that maintains a constant 45%-50% relative humidity level within your instruments case

Protects your instrument against warping, cracks and other damage cause by lack of humidification

No more manual adjustments based on seasonal changes, geographic locations, temperature, or other factors Unlike refillable humidifiers

Eliminates the guesswork and anxiety of maintaining your instrument’s proper humidity level

No water, no drips, no mess

Custom made by Boveda for D'Addario