We have a 200-gallon fish tank in our home and another 40-gal tank. We constantly have moisture in the air and it is paired with the fact that we live in an area that always has rain in the forecast. I utilize these around my tanks, in closets and under my sinks to prevent mold and mildew from growing as well as protect my hardwood floors. The moisture bags protect my family’s clothes and other items from excess moisture damage.Absorption:Obvious from what our home uses these for they needed to be eco-friendly, which we are very happy with. Our pets need enough moisture in the air to be health and these do not dry out the air to any extremes that would cause damage to plants, furniture, or any household items.Uses:They work very well in small or large places such as closets, basements, cabins, bathrooms, garages, laundry rooms, and other enclosed spaces.Life-Span:We have used something similar and the lifespan was not as long as these. They last relatively well since they are combating a large amount of moisture in our air. With our tanks and our weather these last about a month and a half. Under normal conditions I could see these last about two months.Visibility:It is fun to change these out because you get to see the effectiveness of the moisture absorption because it collects in the lower part of the bag.Ease of Use:The use honestly can’t get any easier, there is no assembly, you simply open the package and hang it wherever it is needed.Included:The package includes four bags that are well packed and ready to use.The moisture bags are truly a remarkable solution to individuals that have a lot of excess humidity in their homes. They are cost effective and efficient.