Martingale collars tighten slightly when a dog backs out, then relax when the dog stops pulling. The twin-loop/limited closure gives added control without creating a full choke.
Listings show overall lengths ranging from about 5.5 inches up to 10.5 inches.
The collars are described as machine washable and use colorfast inks or dyes, so they are reported not to fade or run when wet.
No. The product descriptions explicitly state these collars are not intended for tie-out.
Some product descriptions state that the Extra Small, 2XS, and 3XS sizes have a 700 lb tensile strength.