Lanyard made with bungee cord or shock cord with pop barrel safety buckle. The pop barrel buckle comes apart with a little pressure. We don't want anybody strangled with a lanyard. Pop barrel article at this link  https://paracordgalaxy.com/content/37-pop-barrel-and-breakaway-safety-buckles . The tutorial for the Easy Bungee Lanyard is at http://paracordgalaxy.com/tutorials/pdfs/patterns/easy%20bungee%20lanyard.pdf  or at the paracordgalaxy.com tutorials page.