Martingale collars are designed to tighten around the neck when dog pulls on the lead. Correctly fitted martingale collars will not choke a dog but will stop the dog accidentally slipping out of the collar. Martingale collars, or half-choke dog collars, are ideal for sighthound breeds with their long narrow heads and strong necks. Currently our martingale collars available in sizes XXS, S and M to fit puppies of sighthound breeds, Italian Greyhounds, Whippets, Salukis, Basenjis and largest Irish Woolf hound. All Dog Moda's martingale collars are very soft and padded for extra comfort. Swarovski martingale models are no exception, these martingale sighthound collars are fully lined in softest cream leather.