CMC Rescue - Sewn-Loop Prusiks Years of development, testing and fine tuning has made our Prusik cord a preferred choice by rescue schools, agencies and rescuers alike. Our Sewn-Loop Prusiks offer unmatched performance—with strength equivalent to a tied Prusik loop, just without the cumbersome knot. The factory-sewn SecureStitchTM is covered with durable clear shrink tubing that allows regular inspection and helps protect the stitching for longer life. These loops are produced with our 8mm Prusik cord. Working-At-Height / Industrial Rope Access / Technical Rope Rescue Working at height requires reliable, quality equipment. The Sewn-Loop Prusiks can be used with confidence in work-at-height maneuvers for industrial rope access or technical rope rescue when used in accordance with the regulatory safety standards they fall under. Always use life safety equipment and gear according to the regulatory safety standards for which it is classified and/or certified.