The harness and lead set is a wonderful training aid that helps you to train your dog to walk at the heel without pulling on the lead. The pack contains a harness, long lead, instructions and a DVD to equip you with the skills and confidence to help your dog learn good habits on the lead. The happy at heel harness is cleverly designed to guide a pulling dog around so they are facing their owner. This stops dogs from dragging owners forward and causing discomfort to themselves and their owners. The lead can be affixed to the harness on either side for left and right-hand use. The harness has a fleece-lined belly strap to for your dog's comfort and is fully adjustable.