Silica Gel Packets will absorb up to 40% of it"s weight in moisture and will work until it"s fully absorbed. By placing packets in with your camera equipment, scuba gear, tool box, boat, camper, car, closet, storage totes, etc. it will assist in keeping moisture away from your valuable equipment in humid and damp conditions. Prevent Mold, Mildew, Corrosion, etc.