A type of wing design in which the main wing root is mounted rearward with wings that sweep forward rather than traditional main wing roots that are mounted forward with the wings swept rearward. The YF-19 and the VF-9 Cutlass are examples of variable fighters with forward-swept main wings. The forward-swept wing's primary advantage is improved maneuverability at transonic speeds (around the speed of sound). A common misperception is forward-swept wing designs are unstable, but this is not the case; relaxed stability is not an inherent part of forward-sweep and is due to other intentional design factors.