Adjustable harness comes with a better fit for awkward sized pets.
 
With an adjustable neck and chest, they can be adjusted in seconds to ensure the perfect fit.
 
A harness differs from a collar in that it takes the strain off of your pet’s neck and distributes it either across his chest or back. The main benefit of a harness, then, is that it prevents injuries to your pet’s trachea, especially if he has a tendency to pull on the leash.