The main purpose of desiccants is to control and decrease the amount of moisture present in the packaging as well as the surrounding air in the cargo setting. This reduces the risk of damage that can be caused by moisture, condensation, or temperature changes which is very common in a container setting. By maintaining optimum moisture conditions, they ensure that products arrive at th... https://www.reddit.com/user/Desiccantpak/comments/1im4x2x/usage_guidelines_when_using_cargo_desiccant_bags/