The EZ Trainer was designed in cooperation with a leading dog trainer of obedience and field. It is easier to use than other head halters and harnesses. It is designed for heeling, sitting, to stop jumping & the whoa command. Click to see the instructional video. Sizes: 3/8″ x 8′ and 1/2″ x 8′ Hi-Viz Yellow only available in 1/2″ roping