These pouches absorb moisture and provide de-moist conditions for all the components where they are placed. Premium Quality Pure and Safe Silica Gel Silica gel Drying agent Each packet contains silica gel crystals which helps to keep moisture away from different components Keeping silica gel in closed places, removes any moisuter that will be formed and prevent the formation of all types rust, deterioration, oxidation, midew, fungus, mold, fogging etc.. It can be placed in a tool box to prevent tools from rusting, they can also be dropped inside a camera / lenses bag to safeguard them It can also be used to protect leather jackets, shoes / boots, photograph albums, computer media storage, electronics