D'Addario Humidipak Maintain – Two-Way Instrument Humidity Control System (49% RH)

D'Addario Humidipak Maintain - Effortless humidity protection for your instrument, all year round.

Humidipak Maintain is a two-way humidity control system designed to maintain a stable 49% relative humidity inside your instrument case. Unlike traditional humidifiers that only add moisture, Humidipak automatically releases or absorbs moisture as needed, helping protect wooden instruments from cracking, warping, fret sprout and structural damage caused by humidity fluctuations.

Set-and-forget humidity stability.

Once installed, Humidipak Maintain requires no monitoring, refilling or adjustment. The system responds naturally to changes in the surrounding environment, regulating humidity whether conditions are too dry or too damp. This makes it ideal for musicians who want consistent protection without constant maintenance, especially in centrally heated homes, studios or touring environments.

Safe for all acoustic instruments and finishes.

Each Humidipak pouch contains a leak-proof membrane filled with a non-toxic salt solution, making it completely safe for use with acoustic guitars, classical guitars, mandolins and other wooden instruments. When used in a closed case, the system provides reliable, even humidity control across the entire instrument, extending longevity and preserving tone.

KEY FEATURES: D'Addario Humidipak Maintain – Two-Way Instrument Humidity Control System (49% RH)

• Two-way humidity regulation – Actively maintains a stable 49% RH by both releasing and absorbing moisture as needed
• Zero-maintenance operation – No refills, no monitoring and no guesswork once installed
• Instrument-safe materials – Leak-proof membrane with non-toxic saline solution, safe for all finishes and woods
• Consistent case-wide protection – Maintains even humidity throughout the instrument case, not just one area
• Ideal for stable environments – Perfect for instruments already near optimal humidity that need ongoing protection