D'Addario Humidipak Control System PW-HPK-01

Keep your valuable acoustic guitar, bass, or wooden instrument safe from harsh seasonal shifts. The D'Addario Humidipak (PW-HPK-01) is an automated, two-way climate control system powered by patented Boveda technology. Unlike traditional wet-sponge humidifiers, Humidipak adds or depletes moisture as needed to lock your instrument case at an ideal 45%–50% Relative Humidity (RH)—with zero guesswork and zero water mess.

• Effortless Protection: Prevents drying, wood warping, top cracking, shrinkage, and sharp fret edges.

• True Two-Way Control: Automatically adds or absorbs moisture based on ambient conditions.

• No Sponges, No Drips: Eliminates messy distilled water refills and the risk of water damage inside your case.

• Complete Starter Kit: Includes three Humidipak packets (45–50% RH) and non-abrasive mesh installation pouches for the soundhole and headstock.

What's in the Box

• 3 × Humidipak 45–50% RH Packets

• 1 × Headstock Pouched Sleeve

• 1 × Dual Soundhole Mesh Pouch

Specifications

• Model Number: PW-HPK-01

• System Type: Two-way humidity absorption & emission

• Target Relative Humidity: 45% – 50% RH

• Compatibility: Acoustic guitars, archtops, hollow-body electrics, and other cased wooden string instruments

• Packet Lifespan: Approximately 2–6 months (replace when packets become firm/crystallized)