Korum Marka-Flex – Fluoro Green 5m is a hi-vis green, ultra-durable stretchy material that knots like regular braid. It grips mono and braided mainline tightly without causing any damage, making it ideal for marking your mainline for improved accuracy or for use as a stop knot on slider floats. - Slim profile marker elastic - Ultra durable stretchy material - Knots like a normal braid - Grips mono and braid tightly without damage