First, let's explain the 4-ply fabric: The first layer (inner) is a soft feel and breathable non-woven fabric designed to sit against your caravan for protection. The breathability means that it draws moisture away from the caravan to allow it to breath giving added protectionThe second layer is a waterproof polyethylene layer that helps protect the caravan from all moisture and helps ensure the fabric does not get waterlogged to increase lifespan and performanceThe third layer is a reinforced non-woven fabric layer for additional protection and performance. The reinforced nature of this layer 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 mudThe 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, mud and similar, but also thanks to the water repellent nature means that the cover does not get water logged which improves the performance when in useOther features include:Storage 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 DimensionsItemCode : sp2112Size (width of caravan) : 7ft 6in - 8ft (215 - 250cm)Lights: CE & RoHS approved LED's (batteries not included)Weight: 1.65 kgFits: 7ft 6in and 8ft caravans