Ensuring that you instrument and case are properly humidified before using the Two-Way Humidification System is essential in order to receive the maximum benefits and longevity of the product. The DAddario Two-Way Humidification Conditioning Packets allow you to safely restore an instrument and case that is in a known dry condition or has previously not been humidified to the proper humidity level without the danger of over humidification. DAddario brings you Bovedas patented, automatic, two-way humidity control technology as part of our instrument care line. Bovedas technology maintains a constant 45%-50% relative humidity (RH) level inside your instruments case. Based on scientific principles, the patented humidification system completely eliminates the guesswork and anxiety around maintaining your instruments proper humidity level.