Boveda humidor packs provide 100% hassle-free maintenance of your humidor----no maintenance and no anxiety! Refillable humidifiers require constant monitoring and maintenance. Not with Boveda. You will never need to monitor your humidifier or take it out to refill it with distilled water. Simply place the minimum number of Boveda packets inside your humidor and you’re all set for several months. No mess and no worries.