This thin paracord has just a bit of sparkle, visible in room light but quite shiny by flashlight in the dark. It is flexible and knots well. Because the cord is thin, I don't think it's reflective enough for someone in a car to see your shoelaces in the headlights, but it is easy to find a dropped rosary at night with a flashlight. The heavier paracord black- and- silver diamond pattern has probably four times the reflective threads, and would be a better choice for shoelaces if you insist on running across the road in front of cars.