CHOKE FREE REFLECTIVE STEP IN ULTRA HARNESS  PURPLE  ALL SIZES  AMERICAN RIVER (XL) Trachea Safe, No Choke - Patented Design Pulls from the Chest ONLY. Double D-Ring Adds Strength Safe Night Walking Reflective strips. Soft Mesh Polyester / Machine Wash and Line Dry Zig Zag Trim Binding Stitch - Prevents Missed Stitches and creates a Super Strong BOND Patented Closure Slide Adjustability - (Other copy-cat harnesses have little or no size adjustment) Our 3 Inch Webbing allows for 3 Inches of Size Adjustment DIMENSIONS (inches): X-Large Chest: 21-24 (Most Important) / Weight (pounds): 25-40 IMPORTANT: Measure the CHEST, just behind the front legs. The harness needs to fit snugly to work correctly