3-pack of replacement packets for the D'Addario Two-Way Humidication System (formerly Humidipak), the first maintenance free, two-way humidity control system, made by Boveda, that preserves a constant 45%-50% relative humidity level within your instrument's case. This eliminates all maintenance and guesswork. The system is recommended by taylor guitars and others for maintaining the stability and playability of your instrument.

• TWO-WAY HUMIDITY CONTROL – D’Addario Two-Way Humidification System 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 by adding or depleting moisture as necessary.
• REPLACEMENT PACKETS – Once the Humidipaks become firm, discard and replace using the three refills that come in this Two-Way Humidification Replacement Pack. On average, the packets will last 2-6 months depending on the geographic location and the conditions of which the instrument is exposed to.
• MAINTENANCE-FREE – Unlike refillable humidifiers, the D’Addario system is maintenance-free. It is long-lasting and does not require any adjustments based on seasonal temperature changes or geographic locations. No water, no drips, no mess.
• PROTECT YOUR INSTRUMENT – The patented two-way purified humidity control system protects your instrument against warping, cracks and other damage caused by lack of humidification. This system eliminates the guesswork and anxiety of maintaining your instrument’s proper humidity level.
• MADE IN THE USA - D'Addario Accessories is known for innovative, problem-solving, quality musical accessories that are proudly designed, engineered, and manufactured in the USA to the most stringent quality controls in the industry.
  
  MPN: PW-HPRP-03