60 gram Boveda packets 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 and ambient dryness. Unlike distilled water and PG solutions with sponge/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.