When you need maximum dryness during transportation and storage of your sensitive SMDs, add desiccants to your vacuum-sealed package. Desiccant works by absorbing airborne moisture left inside the bag after vacuum sealing, and captures moisture that manages to pass through the bag material. Secure in a strong pouch of clean room compatible, sulphur-free, Tyvek, these desiccants keep your devices dry. Meets the requirements of EIA 583 and MIL-D-3464, Types I and II. Choose from two sizes for just the right amount of moisture protection.