The first layer is a soft feel and breathable non woven fabric, the breathability means that it draws moisture away from the caravan. The second layer is a waterproof layer that protects the caravan from all moisture and helps ensure the fabric does not get waterlogged to increase lifespan and performance. The third layer is a reinforced non woven fabric layer for additional protection that adds strength to the cover and gives the cover a better padding and thus gives your caravan better protection from road debris such as stones, grit and mud. The fourth layer outer is a non woven fabric. It is the hardest wearing layer that is both waterproof and water repellent. This again helps protect the caravan from water and mud.featuresstorage bagadjustable and reinforced buckle and kador strapsadded protection when towing your caravanpremium 4 ply fabric with soft touch inner layerincludes led lightsa frame cut away and buckle strapadjustable width to ensure the best possible fitweatherproof, extra strong velcro pockets for secure fitting of led lightsu.v. Protectedwater repellenthitch strap kit included, for additional securitymaterials and dimensionslights ce rohs approved led's batteries not includedweight 1.65 kgfits 7ft 6in and 8ft caravans