Triple Threat(TM) Aluminum Bar sole provides solid, edge to edge aluminum coverage that morphs to surrounding geology for positive grip. Traction: The 100% customizable sole that gives you endless spike, bar and hex disc configurations for the ultimate in options. Chassis: Sticky rubber outsole with over-molded stainless-steel receptacles which accept any combination of Triple Threat spikes, bars, or hex disks. Fit: Match the sole size with your OmniTrax 3.0 boot for a perfect fit.