Boveda 2-Way Humidifying Pack

How to use:
First remove the clear overwrap from the Boveda, then simply place the unwrapped pack in your humidor/storage and close the lid, it’s that easy. Boveda automatically restores and maintains humidity.
Don’t mix RH (relative humidity) levels within the same humidor/storage container. And do not use Boveda in the same humidor with other humidifcation products because they will fight against each other and reduce the efficiency of Boveda. 

Lifespan:
In a humidor/storage container: 2 to 4 months
Unopened package: up to 2 years.

Replace: Do the touch test. Order replacement packs BEFORE Boveda is totally rigid to avoid a lapse in humidity. 
Boveda is still working if you feel Hardening at its corners & soft spots among some hard areas.
Boveda is expired if the entire pack feels rock solid all the way through. 

The size 320 is the largest Boveda, and is often used in storage bins to protect up to 5 pounds (2.5 kg) of product. Add this to your product to protect from mold or drying.

Choosing the right RH (relative humidity) comes down to personal preference depending on how you prefer your smoking experience or what the humidity level is where you are located.