Unleash your animal running instinct. The Reebok Zigtech Shark ($99) is a recent variation of the famous Reebok Zigfly, made of more agressive lines. The zig zag sole of the Zigtech Shark a sole ressembles shark teeth and provide more durability and traction. Designed to blend and flex, the outsole helps the runner achieve more from the same effort. Available since June 1 2012, the Zigtech Shark has been released in many different summer colorways.