Premium Archery Vanes with Flex-Fletch Logo | SK2 SK2 premium archery vanes excels in compound archery and crossbow. It is designed for high-speed and suitable at speeds under 300 F.P.S. thanks to it's tapered design and clean cutting edge. The SK2 is great for hunting and 3-D, it guides traditional broadheads with ease. Originally introduced as a vane that will withstand the extreme speeds from crossbow archery, it quickly gained notoriety in 3-D and compound hunting. The Flex-Fletch series of vanes is world known for their unique ability to dampen arrow oscillation, stabilizing the flight of the arrow quickly to give you flatter trajectory and better groupings. It's all in our urethane, no other vanes have this capability! Our unique material and exclusive molding process produces a vane with exceptional Memory and durability.