Humidify 6 - 25 cigars.
NOTE: DO NOT trust the humidification indicator card (as seen in the larger 420g pic) that comes with these. In our opinion it is not a good indicator of when you should replace these packs. They will stay pink (won't ever turn "Blue") for months if you throw them on your office floor! (The cards don't work but the humipak works great for about 30-45 days)
We recommend replacing the Boost packs every 30 days, this is what we do with our personal humidors at the house.      Rob Worley, Owner Taboo Cigars.