Boveda 62% Relative Humidity Pack Small
How 2-way humidity control works
2-way humidity control works by continually responding and adjusting to the outside temperature and climate by either adding or removing humidity as needed to maintain a predetermined level of relative humidity (RH) inside of airtight packages and containers.
Maintaining an ideal and constant relative humidity means your product won't lose or gain any moisture. Instead, it'll be maintained at its ideal moisture level throughout its intended shelf-life and/or usage-life. Furthermore, it'll never encounter any moisture fluctuations along the way.