Desiccants are drying agents used to reduce humidity and moisture inside an enclosed space. With proper use, desiccants will both maintain and/or lower the humidity level within packaging or a container for an extended period of time. Silica desiccants are packaged in a sturdy Tyvek material to avoid punctures or tears. Silica Desiccant packaged in Tyvek. 1 year Store at room temperature. Avoid storage in direct sunlight. Meets all REACH and RoHS Requirements.