XIKAR 2-Way Humidity Control provides hassle-free maintenance of full-size humidors and HumiStore® Bags. Within an enclosed container, XIKAR 2-Way Humidity Control monitors the ambient RH (relative humidity) and adds or removes moisture to maintain the specific RH engineered into the pack. Because it's impossible for XIKAR 2-Way Humidity Control to humidify beyond the RH on the pack, it's impossible to use "too much".  60g XIKAR 2-way humidity control packs provide hassle-free maintenance for full size humidors, humidor bags and air-tight food storage containers.