Depending on the amount of contents to be preserved, we recommend the following guidelines.Up to 12 grams of your product:4 gram Boost pack12-28 grams of your product:8 gram Boost packUp to 1 pound of your product:67 gram Boost packUp to 5 pounds of your product:320 gram Boost packUp to 6 pounds of your product:420 gram Boost packTip: it's always better to use a larger size pack. Our smart 2-way humidification technology responds accordingly to create equilibrium even if you use extra Boost packs or a larger size than necessary.