Boveda's patented humidity control packs regulate moisture content; providing 15% higher terpene and cannabinoid retention than cannabis stored without Boveda and adding or removing pure water vapor, as needed, to maintain a precise relative humidity (RH). Only Boveda responds to any atmospheric humidity conditions inside a container by maintaining the predetermined relative humidity (RH) level of 62%. They don't need any activation or maintenance. Just place them in an airtight container with your items and Boveda technology will do the rest.