These heavy duty caravan covers are made of 4 layer SFSS fabric. They will keep your caravan in great condition when not in use. The four layer fabric is made of rugged water repellent polypropylene. They give excellent UV protection. A great feature is that they have multiple zippered panels for easy access to the front, back and sides. Ladder cap and storage bag included. These covers are easy to install and remove and have elasticated corners. The size options are as follows: 12ft to 14ft | 14ft to 17ft | 17ft to 19ft | 19ft to 21ft | 21ft to 23ft | 23ft to 25ft.