Hua You Silica Gel Dessicant Dehumidifier 1 g Pouch - Pack of 400 Pieces When kept inside closed places (where mold, mildew and fungus live plus breed) silica solution whisks away moisture to create a defensive environment of dry air. It prevents all types of rust, deterioration, oxidation, mildew, fungus, mold, fogging, etc. Silica gel is chosen to avoid tarnish on gold plus silver, inside a tool box to safeguard a valuable tools from rusting or drop several inside the camera bag to safeguard the camera plus equipment. It even protects pricey leather products like jackets, boots, plus boots. Additionally remarkable for tackle boxes, photograph albums, computer media storage, weapon situations, ammo boxes, coin collections, camping gear, backpacks, campers, electronics, etc.