X Factor Supreme Wrist Sling Black/Blue. Comes with a rubber yoke that holds its integrity in any weather adjusts in seconds and is fully reversible. Package Contents: X Factor Supreme Wrist Sling Made from four strands of 500-lb paracord with an extra Cobra Weave on top of the slim wrist sling for added strength and comfort. Comes with a rubber yoke that holds its integrity in any weather adjusts in seconds and is fully reversible.