The Halti Optifit Headcollar is a dog head collar designed to reduce pulling on the lead by steering from the muzzle. Developed by animal behaviourist Dr. Roger Mugford, it fits small, medium, and large dogs with an adjustable design that accommodates a wide range of nose lengths.

The Optifit uses a figure-of-eight configuration that controls the head without restricting jaw movement or applying pressure to the neck. Adjustment points on both the nose band and neck strap allow a precise fit across different head shapes. The design works on the principle that redirecting the head redirects the body — useful for strong pullers where collar-based leads provide little control.

The Halti Optifit is typically chosen by owners dealing with dogs that pull hard enough to make walks unpleasant or unsafe. It's a training aid rather than a permanent fixture — most owners use it while working on loose-lead walking, then phase it out as the behaviour improves.