The Black Diamond 10mm Dynex Runners are indispensable for building anchors, slinging natural features, or extending placements to reduce rope drag. This highly abrasion-resistant, lightweight material won't weigh you down and absorbs less water than nylon. An essential part of any alpine climber's rack Dynex is highly abrasion-resistant, strong & lightweight Perfect for big routes & snowy or icy terrain Color-coded for easy size identification