The anti-escape martingal collars are made of nylon tape, lined inside and out with a fabric that is soft to the touch and at the same time resistant. The buckles are made of very strong cast iron, and with a silver finish. The Rainbow print is an explosion of colors that dye friendly greyhounds. The tones couldn't be more summery! It's the perfect outfit for them, for those evenings and walks together that end with delicious ice cream. It can be washed with cold water or a maximum of 20º. You can wash it as many times as you want, it will never lose color!