Boveda 72% 60 Gram
Boveda provide hassle-free maintenance of full-size humidors and Humidor Bags. Every Boveda RH is accurate to +/- 1% in an air tight environment, which humidors are not. It's common that the actual RH of your humidor will stabilize up to 5 points lower than the Boveda RH you're using, due to humidor quality and ambient dryness.
Unlike distilled water and PG solutions with sponges/gel/crystals/beads that will impart unwanted flavors on your cigars, Boveda's reverse-osmosis membrane only releases pure water vapor and Boveda will never damage anything through direct contact. Boveda will never over-humidify, using more than is recommended will just work more efficiently and need to be replaced less often. So with Boveda, you can never buy more than you need.
Use at least one 60 gram Boveda per 25 cigars your humidor holds (even if it isn’t full), and one for the humidor itself. This should last for between 2-4 months depending on humidor and conditions.
Once you smoke a cigar stored with Boveda, you'll finally enjoy it exactly as the master blender intended.
Note: Do not mix Boveda RH levels within the same humidor, and do not use Boveda in the same humidor with other humidification products. They will fight against each other and reduce the efficiency of the Boveda.