We make the breast collars out of 10 -12 oz. Harness Leather and have different colors available. The Breast Collar comes standard with nickel plated hardware, which can be exchanged for solid brass or stainless steel hardware (for an additional cost). The lining is a soft chap leather. The connector ring the center is lined with real sheepskin and won’t rub on the animal. Custom inquiries are welcome e.g. tooling.