Concrobium Moisture Grabbers absorb excess humidity to protect surfaces and possessions against moisture damage, musty odors, rust and corrosion. The Moisture Grabbers pouch traps moisture on the inside and stays completely dry on the outside. Use it in closets, bathrooms, cabinets, pantries, storage bins/totes, safes, lockers, luggage, sports bags, cars, trucks, RVs, campers and boats.