Boveda Humidification System - Wooden Instrument Starter Kit

The Boveda Humidification System -  Wooden Instrument Starter Kit includes the following:  Starter Kit includes 2 large 70 gram Boveda packs and 2 leak-resistant fabric holders. Boveda technology is unlike all other 1-way humidifiers, it's the only true 2-way humidity control that will add or remove moisture as needed to maintain between 45-55% relative humidity in your guitar case. Protects your wooden instrument against warping, cracks and other damage caused by lack of humidification or too much humidification. Typically lasts between 2-5 months in a seasoned case. Longevity depends on time of year, case quality and ambient RH levels.