How long do the Boveda packs last in a CVault?

That depends on a multitude of factors, i.e., how often the CVault® is opened, the humidity of the outside environment when the CVault is opened, the humidity level of the flower being stored, etc. As a general rule, however, a Size 8 Boveda lasts three (3) months in a CVault with regular use. Once the Boveda feels completely hardened, replace it with a new one.