Boveda’s humidity control pack keeps your cannabis at ideal relative humidity levels by adding or removing moisture in an enclosed environment. This product is final sale. Boveda’s patented two-way humidity control responds to ambient conditions by adding or removing moisture to affect the enclosed environment and deliver the pre-determined relative humidity (RH) level printed on the pack (58% or 62% RH, depending on your preference). When Boveda is completely dry, it will turn into a solid wafer—when there are very few soft spots left, you’ll want to replace it.