GM CLIMBING 8mm (5/16) Prusik Loop Pre-Sewn 18 inches/24 inches GM CLIMBING 18 8mm pre-sewn prusik loop is made of double braid 8mm polyester rope which features excellent abrasion-resistance, high strength and long lasting performance. Supple in handling, flexible and easy to tie knots. Simple While Powerful! You could find it an amazing gear in 100 outdoor applications. With heat shrink tube over solidly sewn stitching part, the prusik loop is safer and better than prusik cord with knots. High Abrasion Resistance! Double braid, braided core with braided cover, well elaborated rope construction to make the cord super firm, and this sturdy sheath gives it great abrasion resistance which guarantees long-life utilization. High resistance to moisture, low stretch and high strength! All is due to its all high tenacity polyester material. One more advantage adds to its excellent outdoor environment adaption.