The Humid-EZE Stick Humidification System is a worry free and easy way to provide the perfect levels of humidity for your humidor. Its an all natural, water based, chemical free system that will maintain a level of 70% humidity and helps to preserve the natural, fresh flavor of your cigars. This system is so easy to use. You simply remove the seal and place in your humidor. Each stick will last 30 days and humidify up to 25 cigars. Have a larger humidor? Simply add more sticks to compensate. (100 cigars = 4 sticks) After 30 days, throw away the old sticks and add new ones. It's as simple as that.