About this item Martingale style collars Martingale collars Recommended by vets and trainers as the best design for daily wear. To prevent escape and correct behavior, martingale is perfect for training, give you gentle control over your pet DurabilitySoft nylon dog collar and heavy-duty hardware won’t easy loose or fray; Strict pulling test conducted before production. Properly fitted, the martingale dog collar will be comfortably loose whenever the dog is not pulling against the leash Quick Release BuckleCan be quickly opened in an emergency. Never leave your dog unattended with a collar on. This dog martingale collar is not recommended to use without a leash and not for indoor use SizePlease make sure to leave only 2 fingers between the collar and dog neck. Refer to the chart choose a size that can slip over the head, properly fitting collar won’t leave any room for your dog to chew and pet won’t slip out of the collar ReflectiveThis reflective do