Humi-Care Water Pillows are the perfect portable humidification solution. Simply immerse a pillow in water, and as the material absorbs the water, it will increase in size. Slip the fully charged pillow into the provided sleeve, and add to your humidor (if it's running a little dry) or your travel humidor or plastic bag. The sleeve will protect your cigars from direct contact with moisture. the Water Pillows can be recharged one time.