Made of a heavy duty caravan 4 ply non-woven polypropylene cover, this 4 Layers 4 Side Open Caravan Campervan Cover Straps 18-20FT is supremely waterproof and durable. Spanning the entire roofing area of the caravan, the slick outer later enables dirt and debris to simply slide off cover whilst providing full UV protection. Manufactured with 100% breathable material, this prevents moisture build up and resulting mould and mildew. The cover also features tough interlocking seams and elasticized hems and connecting straps and buckles allowing a tailored and secure fit for a wide range of caravan sizes. A zip opening situated on the side of the cover enables easy and convenient access to the caravan.