Bergan"s harnesses meet V9DT B2009.1. Pet Safety Durability Test (see www.v9dt.com) * Minimum durability thresholds designed to ensure confidence that harness will sudden stop forces while minimizing distractions from traveling pets * The complete harness system comes equipped with adjustable safety tether and two high-grade aluminum carabiners * The harness is durable but lightweight and comfortable * Fully-adjustable: Large: for pets 50-80 lbs