DampRid Disposable Moisture Absorber with Activated Charcoal is the moisture absorber odor eliminator that will make the air cleaner in small spaces that go months without use. This unique moisture absorber with the activated charcoal doesn t just cover up musty odors it absorbs and removes odors from the toughest sources. No more stale stagnant musty smells! Designed for use in stored sitting boats and RVs where stagnant air and excess humidity are often a problem. To use simply remove the lid peel off the foil and place where desired. Discard the canister once the crystals have fully dissolved. Keep out of reach of children. Read and follow all label directions.