Recommended by dog trainers across the country. The collar provides cues and feedback to reduce pulling and enhance dog training. Endorsed by thousands of dog trainers our martingale collar is superior than the competition for its durability, effectiveness, and stainless-steel chain. Features: The 100% stainless steel chain provides improved durability. 100% premium quality leather and stainless-steel chain is built to withstand all-weather conditions. Our collar is constructed with a stainless steel chain eliminating discoloration and maximizing durability. Designed to make training with your dog safe and effective; collar tightens under tension but only tightens enough to provide a subtle controlled training cue to your dog.