Black elastic strap with metal attachment clips to each end . These were fitted using the small brass 'eyes' sewn onto the rear of the Irvin collar. These straps are often referred to as spare goggle straps but were in fact used to help pull the collar into the upright position. Light soiling and fading. Minor edge fraying. Still retains a little elasticity. Minor marking/tarnishing of metal parts. Quite good used condition. Remarkably difficult to find. Sock code J.