Our collection of 1.5" and 2" Martingale Collars are hardwearing and practical. A martingale collar is a walking out collar which fits loosely on a dog’s neck but tightens when it needs to. If your dog has ever slipped or backed out of their collar, you may want to consider using a martingale collar for safety reasons. They are especially safe for dogs with narrower heads such as whippets, greyhounds and lurchers as these dogs often have an easier time slipping out of a regular collar. Matching Leads and House Collars are available.