All weather protection ! Aluminised Water resistant lightweight fabric, allow evaporation of condensation from beneath the cover. Nylon securing straps & buckles with elasticated hem for secure/tight fit & extra strong double stitched seams. Zips both sides for easy access to caravan when cover is in use. Also comes with a handy storage bag. It also helps protect your caravan against : dust, dirt, Tree sap, bird droppings & Industrial pollutants.