The Boveda 2-way humidity control system for large musical instruments adds humidity when ambient air is dry, and removes excess humidity when ambient air is damp. The kit contains everything you need to keep your instrument safe during humidity changes. Especially designed for large instruments - double bass, cello, acoustic guitar, bassoon, bass clarinet, etc. The starter pack includes four large Boveda packs, two custom made sleeves to hang from the instrument and detailed instructions in words and pictures.
We now carry the Refill Packs for this system. As you'll need to replace the humidity packs periodically, stop by HERE to order as many as you wish.
This is the perfect solution when shipping an instrument, traveling to a drier climate, or trying to survive winter months without open seams or cracks. See this video from instrument maker Nick Lloyd about this product:
https://www.youtube.com/watch?v=vTB86mE0mmI