Winglets are small extensions attached to the tip of an aircraft's wings, designed to improve its aerodynamic efficiency. There are several synonyms for the word "winglets," including wingtip devices, wingtip fences, sharklets, and blended winglets. Wingtip devices are the original form of winglets and are designed to reduce drag and increase lift by limiting the formation of vortices at the wing's tip. Wingtip fences are similar to wingtip devices, but they are a more slender protrusion that protrudes from the wing's forward edge. Sharklets are a trademarked term used by Airbus to describe a type of winglet that is designed to reduce fuel consumption and improve aircraft performance. Blended winglets are longer and more angled than traditional winglets, providing more lift and less drag.