American Made Resco Cordo-Hyde Martingale Leads combine our Resco Show Lead and a Resco Choke Collar for better control in the show ring and training exercises. Cordo-hyde is a unique wax-coated cotton material that can be balled up in the hand to hide the lead and it's stiff enough so that the dog will respond to a handler's tug on the lead in the show ring. You will have quick release with our American made nickel plated bolt snap.