Concrobium Moisture Grabbers are a humidity absorbing product designed to protect surfaces and possessions against: moisture damage, musty odors, and rust and corrosion. The unique water-attracting and storage technology is engineered to capture and reduce moisture in small, confined areas. Recommended for: A single pouch is effective for spaces up to 350 cubic feet. This product is ideal for use in small, confined spaces including: closets, bathrooms, cabinets, pantries, storage bins, safes, cars and trucks. 27.6 Oz.