The comfortable control harness automatically sends control signals to the chest and body areas of your pet that will respond too without causing them any pain of discomfort If you have a small to medium dog then you really need the comfortable control harness. Using a regular collar with a leash is actually quite dangerous for your small dog because their small necks are very fragile, and also their wind pipe is easily crushed by too much pressure from a regular collar. If you have a small/medium dog like a Yorkshire Terriers, Shih-Tzu’s, Pug, Boston Terrier, Cocker Spaniel, Jack Russel or something like that, this collar is perfect for you. The comfortable control harness is easy and convenient for you, and comfy and safe for your little pup Description: • Custom adjusts in seconds • Easy clip on matching 5 foot leash • Open weave design allows air flow • Doesn't constrict breathing • Stylish vest slips right on.