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.

Features

• 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