ADJUSTABLE & CUSTOMIZABLE FITThis dog harness has dual elastic construction on belly straps, provides stretchability for more comfort and help absorb jerks, reduce strain and the risk of getting Hurt. ALL WEATHER MESH Made with a soft, breathable air mesh, this lightweight pet harness is perfect for walks all year round. NO PULL, NO CHOKEThe no pull dog harness has two D-rings, easy links to traction rope hooks, ot easy to swing, prevent suffocation and pull.Padded design reduces tugging and pulling on your dogs and cars neck. SIZES = Neck 10.6"-12.9"(27-33cm), Chest 15.3"-18.8"(39-48cm). M = Neck 13.3"-14.9"(34-38cm), Chest 19.2"-25.1"(49-63cm). L = Neck 15.3"-20.4"(39-52cm), Chest 24.4"-30.7"(62-78cm). XL = Neck 20.8"-29.1"(53-74cm), Chest 29.5"-37"(75-94cm). Please DO Measure Dog's Neck & Chest Girth before Buying. When it properly, two fingers should barely between the fur and strap. EASY TO PUT ON & TAKE OFF: Unique quick-release buckles design which allows you to put it on from the side of the dog's neck with its 2 quick-release buckles. Just slide the harness over dog's head, buckle it up, adjust the straps.