Integra Boost Humidity System These handy little humidity control packs are used to control moisture in an enclosed space. Their patented technology will either release or absorb moisture, maintaining a relative humidity of 69%. They also include a smart, simple to read replacement indicatorr card so you know when it's time to refresh. Can be used for all tobacco products including cigars, pipe, and hand-rolling tobacco to keep it fresh and in it's best condition.