Boveda 2-Way Humidity Control Kit for Cello/Guitar
A patented 2-way humidity control technology that continually responds to ambient conditions by adding or removing moisture.
Each pack consists of a specially prepared saturated solution of pure water and natural salts that automatically protects against warping, cracks and other damage caused by lack of humidification or too much humidification.
Automatically responds to any storage environment, geographic location or change in temperature
Adds or removes moisture on its own (eliminates messy sponges, hoses, discs, etc.)
Maintains a constant relative humidity between 45-55% - the ideal climate for wood instruments.