ULTRA CHOKE FREE STEP IN REFLECTIVE DOG HARNESS  AMERICAN RIVER OMBRE NORTHERN LIGHTS  ALL SIZES (Large) Doggie Design is the FIRST and ONLY company in the world to create this Exciting New Harness Design Our LATEST PATENTED "Ombre" American River No Choke Harnesses Certified Break Strength Tested to 386 Lbs, by an International Independent Testing Laboratory This Step in Mesh No Choke Design in REINFORCED large dog sizes, up to size XXXL (approx 90 Lbs.) DIMENSIONS Size: M - Chest: 16-19 Weight (Lbs.): 11-16 IMPORTANT: Measure the CHEST, just behind the front legs. The harness needs to fit snugly to work correctly