Firewire '9X Expander Packs

Find the 9X Expander Pack here: www.firewire.media/ New 9X Expander Packs put you in control - use any number of packs to track any shape in your quiver, however you want. One pack tracks the space in-between your front and back foot traction perfectly. Two packs create a front foot traction layout different from anything you've seen before.