2-way humidity control for large musical instruments. This box contains everything you need to keep your instrument safe during humidity changes. The kit is especially designed for large instruments - double bass, cello, acoustic guitar, bassoon, bass clarinet... didgeridoo. The starter pack includes four large Boveda packs, two custom made sleeves to hang from the instrument and detailed instructions in words and pictures.
This is the perfect solution when shipping an instrument, don't worry about lack of climate control in the belly of an airplane or greyhound bus. It also works great when traveling to a different climate or trying to survive winter months with as few open seams and cracks as possible. Check out this video from Nick Lloyd about them: