Our Connor straps are made of a rare Italian calf leather of the highest quality. This particular grade leather has an incredible texture and appearance that will evolve with use and develop a beautiful patina over time. In addition, each strap is lined with top-grade calfskin that's tanned to give it a supple feel as well as hypoallergenic properties, making it incredibly comfortable on the skin. Only available in a limited selection of colors with matching stitching, our Connor straps are truly one-of-a-kind. Quick Release Spring Bars.