Moisture In The Air Is Normal, But High Humidity And Poor Ventilation Cause Excess Moisture. This �damp� Can Cause Mildew, Mould, Musty Odour And Peeling Wallpaper. The Moisture Trap Is An Easy And Effective Solution To This Problem. High Airflow Design = Ultra Fast Moisture Absorpation: - Protects Against Damp And Mildew - Combats Musty Odours - Improves Air Quantity - Simple And Safe To Use In Confined Spaces - Ideal For Use In Kitchens, Caravans, Boats And Bathrooms - Works At Its Best For Up To 6-8 Weeks