A dog harness with duraflex buckle duraflex buckle is lightweight but has a large loading capacity which can improve the tensile strength of this dog harness. A dog harness with double leash attachment points zinc-alloy D-ring on the dog’s back and webbing with zinc-alloy o-ring on the dog’s chest. You can pull it from the front or back. Pets Empire dog harness ergonomic schemed is much more comfortable, easy to put on, and take off. Multi-size: measure your dog’s chest with a tape, at whatever point gives the widest circumference of the front chest.