Silica Gel Bags are used to absorb moisture and keep things dry. Many manufacturers add these desiccant packs to their new products to keep them fresh and moisture-free for the consumer. The silica gel adsorbs moisture from the air, preventing damage at the point of use of the compressed air due to condensation or moisture. Silica Gel Bag is also used to dry the air in industrial compressed air systems. Air from the compressor discharge flows through a bed of silica gel beads. Silica gel is chemically inert. This means it won't break down in the body and cause poisoning. These bags are very effective as well as economical too.