This 24-strand cover line is a true 1/2" (12.7 mm) and is the lightest premium climbing line of its size available. Like its counterpart Velocity (but a little larger for easy handling) - Vortex has excellent knot-holding ability, works well with hardware, and is great for foot-locking. Compared to ropes of similar size, Vortex has 25–30% lower elongation when used at the same load.