Control excess humidity, prevent damage to your home and prevent build up of mould, bacteria and allergens with this 2 pack of SpiraFlo Refills (for use in conjunction with the SpiraFlo Moisture Absorber - sold separately). SpiraFlo Refills contain 1000s of active absorbing crystals that pull in damp air and convert it into liquid inside the sachet. The moisture absorbed from the air is trapped inside the refills, which means no drips and no spills. Each refill pack contains 2x Breathable Fibre Refill Sachets for maximum absorption. Each refill pack can last up to 10-12 weeks in a 20m² room, depending on humidity