Martingale Collar Romeo Anti-Escape for Greyhounds and Escape Artists If you have a greyhound or an escape artist dog, or one that tends to pull a lot during walks, the Martingale Collar Romeo is the ideal option to ensure their safety and control. This anti-escape and anti-pull dog collar features a self-adjusting part that tightens when the dog tries to pull its head out, preventing it from escaping. Additionally, when the dog pulls, the collar tightens to create a choking sensation that will make it stop, reducing the effort we have to make to control it. The Martingale Collar Romeo is elegant and sophisticated, made of high-strength polypropylene webbing and covered with a combination of two high-quality fabrics. This mix of fabrics and prints adds a touch of style to the collar, ensuring its durability and comfort for your pet on every walk.