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Apex Alpha K9’s Martingale Collar for Large Dogs: When you are walking your canine with a collar and lead, your dog is an extension of you. The communication gap between you and your dog or puppy can be challenging when teaching and shaping behaviour early on. We designed this martingale collar for dogs that pull, distracted puppies, and powerful large breeds so that you have an effective collar to teach desired behaviours and manners in a humane way. This training and dog walking collar is also known as a no-slip and no pull collar for dogs. Our martingale collars are made from a comfortable polyester and won’t chafe and create hair loss like nylon collars. These martingale dog collars for medium dogs, large and extra-large dogs will help you effectively handle and control your dog. Choke collars and chains are not safe to use and can harm your dog if used incorrectly. Our martingale collars for puppy training are safe to use with untrained, anxious, or energetic puppies, making them essential dog training accessories. Our collar has a quick reactivity to check and release tension safely to establish certainty and confidence for stronger companionship and less hassle with your dog. Sizing - For medium, large, and extra-large sizes the dog collar width is 1”, 1.5”, and 2” respectively. About Us: We at Apex Alpha K9 want to change the negative stereotypes of strong working breeds by helping establish effective handling to ensure certainty and confidence in our canine family members. We specialize in designing collars that are unique, expressive, rich, and dynamic to match the character and personality of your dogs and puppies! 10% of our monthly sales go to organizations in need like The American Pitbull Foundation (creating service animals for people in need) and Operation Sidekick (rescuing and training Pitbulls for veterans with PTSD). We hope you love our martingale collars for dogs extra large as much as we do. Thank you for supporting our small business!