Some good types of vests for service dogs include padded vests for the dog's comfort and vests made out of reflective materials for enhanced visibility. Many service dog vests are made out of mesh, as it is lightweight and prevents overheating.
Service dog vests have highly visible patches and markings to indicate clearly that the animal wearing it is a service dog. As of 2015, service dogs are not actually required to wear vests, though many disabled people find it expedient, as it clearly identifies the dog as a working animal. Because the vest is meant to be worn outside while the dog is on a lead, the vest often includes straps that allow it to be attached to a leash and be used as a harness. Some vests include handles, so the dog can be easily lifted.