Unique sewn and Bound Loop Prusik are Sterling originals developed back in 1999. Their 8mm Prusik was designed specifically with the proper rope grabbing characteristics required for good rope management. In a dynamic event, the bound loop feature keeps the loop on the strong spine of the carabiner, preventing an accidental jam on the plate of the pulley. The optimized tack stitching is covered with shrink tube for protection and inspection.