Using patented 2-way humidity control technology, the Boveda packs eliminate naturally occurring humidity spikes and regulates the conditions inside the container, preventing your herbs from losing any potency from the evaporation of oils or other active ingredients.  The components of the Boveda humidity packs are natural elements: salt and pure water. There are no chemicals used within and all ingredients are food grade approved. The Humidipak only allows pure water vapour in and out of the C Vault system.   Terpene & Trichrome Retention with Boveda Packs Studies show a 15% higher terpene and trichrome retention when storing with Boveda rather than without. Why? Because Boveda packs create and holds the ideal moisture content to optimize terpene retention.  Boveda Packs Mold Inhibition Your Boveda packs ensure that the relative humidity in your containers and packaging will be held below the point at which mold accelerates it's growth, regardless of the outside environment-something other products cannot claim.