Our Cigar Swami Water Pillow Humidifiers were designed to create an atmosphere of 68-72° relative humidity inside your humidor. Simply activate your water pillow by dipping in Cigar Swami PG Solution for 20-30 seconds, air dry, insert activated pillow in the zip-lock pouch provided, and place inside an air tight container or seasoned humidor. These trustworthy water pillows can last up to 90 days and are reusable, just repeat the directions above to reactivate. Dimensions: 3"x 4" (includes pouch)