Halti Headcollar Blue Combines maximum steering efficiency with great doggy comfort. No metal parts in contact with your dogs skin and the point of steering is well away from your dogs eyes. Muzzling action is practical, safe and can be used passively to stop dogs pulling or as an active training aid, combined with rewards. A comprehensive booklet "dog training the halti way" and Halti link are included free with every halti headcollar pack. Please note that bitches and younger dogs may need a smaller size.