1. Highquality Militarystandard MaterialsLarge dog harness is made of oxford fabric and durable nylon, adopts an upper and lower twolayer structure, with sturdy stitching for extra durability, and the inner layer is a mesh material with excellent breathability, comfortable fit and no harm to dog. Ideal for professionally training hiking walking for German dogs, Shepherds, Doberman pinschers, Retrievers, Labrador Retrievers etc. 2. Dog Harness Size InformationDog vest harnesses are available in M, L, XL sizes for your choice. Ideal for professionally training hiking walking for German dogs, Shepherds, Labrador Retrievers etc. Please choose right size base on size chart. Size Middle for dog weigh 1530 Lbs Nick Girth 1217inch Chest girth 1724inch Size Large for pets weigh 3049 Lbs Nick Girth 1518.8inch Chest girth 2028inch Size XLarge for pets weigh 4599 Lbs Nick Girth 1621inch Chest girth 2536inch 3. No Pull Design Dog Harness With ONE NEW THICKENED SOFT HANDLE AT BACK Double thickening feels softer and more comfortable. Our tactical dog vest featured with 2 Sturdy Metal DRings which are reinforced on the extensional part. One Front Clip for No Pull control or dog name tag. One D right on the Back is for short leash, tough training hand heavy duty purpose 4. 2 BucklesThe 2 buckles are made of heavy duty plastic and built in a trigger, press the button on the buckle you can release the buckle immediately, each buckle can bear 2000N pulling force to ensure it won't be easily damaged