Engineered by scientists to maintain an exact relative humidity within a storage container, Boveda humidity control packs prevent humidify from rising beyond the RH provide on the packaging, so your dry herb will remains consistent. The Boveda pack needs to be replaced when it starts to feel very dense. To maintain a precise relative humidity, Boveda contains a saturated solution within a permeable membrane. This allows for the absorption and release of purified water-vapor as needed to hold the proper humidity.
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