CandyPet Martingale collars consist of two nylon straps, which in our case are lined with cotton fabric on both sides (to minimise friction on the neck) and connected by welded metal buckles. The seams are reinforced for extra durability. Use a semi-curly system, with the advantage that the dog will not hurt due to the width of the collar. Also known as "anti-drain necklaces" as it is almost impossible to escape a correctly fitted martingale. It is ideal for dog breeds that have a narrow head with their neck, such as greyhounds or forces. But they can be used perfectly for any breed of dog.