These simple green straps are meant to be wrapped around the feet.

When you make an unarmed attack at the end of a charge, immediately after you attempt the attack, you can activate cobra straps to move 5 feet away from the target without provoking attacks of opportunity.

Prerequisites: Craft Wondrous Item, expeditious retreat, possession of a piece of the set.
Cost to Create: 500 gp (plus 400 gp for base item), 40 XP, 1 day.