CHOKE FREE REFLECTIVE STEP IN ULTRA HARNESS  BLACK  ALL SIZES  AMERICAN RIVER (Medium) Patented Conforming Shape Fit Seam Technology - Causes harness to conform to Dogs Chest curve. Trachea Safe - Choke Free Patented Design Pulls from the Chest ONLY Double D-Ring Adds Strength Same Color trim binding as the mesh Safe Night Walking Reflective strips.