Boveda Medium Humidipak 69% 6 Pack 8g Boveda are for small containers or travel humidors. For desktop humidors and large containers, you'll want the large 60g Boveda. Boveda monitors ambient humidity and adds or removes moisture to maintain the RH engineered into the pack to an accuracy of +/- 1%. Zero activation or maintenance. Available in a variety of RH levels, Boveda provides a perfectly stable environment for the storage of tobacco, musical instruments, food and herbal medication. It's time to replace the Boveda when there is very little softness left in the pack.