The 30g HF Gelly Humidifying pounch and hygrometer is a patented, revolutionary tool designed to keep your cigars fresh and mold-free. Inside the pounch is a mixture of propylene glycol and gel crystals to keep the optimum humidity required for your cigars. Just peel off the stickers on the side to activate for 90 days. On the outside of the pouch, there is a colorimetric hygrometer with a central cobalt salts indicator. Use one Gelly 30g pouch for every 10-15 cigars. Size: 7" x 4".