Bergan Dog Auto Harness with Tether Bergan's harnesses meet V9DT B2009.1. Pet Safety Durability Test (see www.v9dt.com) The minimum durability thresholds are designed to ensure confidence that a harness will withstand forces generated from sudden stops while minimizing distractions from traveling pets The complete harness system comes equipped with adjustable safety tether and two high-grade aluminum carabineers The harness is durable but lightweight and comfortable Fully-adjustable: Xlarge: for pets 80-150 pounds