Some smart person somewhere got the idea to make a collar for dogs with heads smaller than their necks! Dogs like whippets, greyhounds and other sighthounds have long, slender heads and muscular necks, meaning that they can slip out of most snap buckle collars.
The martingale has a loop that slides through two square rings to tighten the collar so that it doesn't allow the dog to slip out. From what I'm told, the martingale is named after the horse tack.
The martingale has become popular with owners for just about any dog. Although my collars are not meant to be used as training or restraint devices, sometimes a little tightening of the collar will allow a dog owner to get their dogs attention without having to "yank" on their necks.
My girls wear martingales even though they have rather.. um.. large heads.
This is your basic martingale collar. See the loopy bit?
This is how it sits on a dog, when the leash is slack.
When the leash is no longer slack, this happens:
See how that works?
Unlike a lot of martingales I see on the market, mine have an extra D ring for Tags.
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