1 refill bag for Boveda guitar humidifier.

The dual-directional humidifier keeps your instrument in good condition in any weather. Boveda humidifiers maintain stable humidity for the instrument, whether the surrounding air is dry or humid.

Guitar humidification can be a bit mysterious, as it's very difficult to determine the humidity level in the case at any given time. The osmosis-based humidifier absorbs moisture when the case air is too humid and releases moisture when the air becomes dry. You can forget about humidifying your instrument as long as you remember to replace the humidification bags when they dry out. During extremely cold winters, the air can become very dry, and the bags may need to be replaced more often.

Features:

1 piece of 70 g Boveda humidifier bags
A bag typically lasts 2-6 months depending on air and case humidity
The humidifier itself is not included.