Martingale dog collars enhance dog safety and control without choking with an adjustable half check. The collar is made with two loops. The large loop is placed around the dogs neck and adjusted to fit loosely. The leash is then clipped to the D ring on the small loop. When the dog tries to pull their head out of the collar, the tension on the leash pulls the small loop taut, which makes the large loop smaller and tighter on the neck preventing escape. When adjusted properly the dog is never choked, but the Martingale Dog collar stays snug around the dog’s neck (just behind the ears) until the pressure is released. HTHT Martingale collar is made from high density fray proof premium nylon webbing for durability and reduced wear and tear. It is woven from quality fine yarn for a softer feel. Product Dimensions: Medium – 15mm (width), adjustable ~30-45cm (length) #htht #dog #collar #martingale