Moves air up and over the rack and accessories, reducing drag and wind noise created by the flow of air over your rack. Improves fuel consumption. Securely mounts to Slimline II rack and extends to the Discovery LR3/LR4's roof. An additional rubber blade is fitted to the bottom edge of the Wind Fairing to seal any gaps and act as a roof guard when traveling over rough terrain. A clear protective strip for the roof is included that stops any scuffing caused by dust.