Martingale collar or Half check collar. Perfect for Whippets, Greyhounds and other sighthounds. Escape proof collar for small headed dogs. – Toodlepips Designs
DF No Pull Martingale Harness for Dog, Nylon Adjustable Front Clip Harness Classic Escape Proof Puppy Harness with Handle for Small Medium Large Dog Training Walking, Black, Chest 33"-42.5" : Amazon.co.uk: Pet
Martingale Dog Collar Blue Check L Greyhound Whippet Training Choke Chain | eBay
Martingale Dog Harness Personalized Laser Engraved Buckle Hugging No Backing Out Halter Harness Dog Id Tag Southwestern Aztec Navajo Tribal - Etsy UK