GM CLIMBING 8mm (5/16") Prusik Swen Eye-to-eye Pre-Sewn 30 inch / 45 inch GM CLIMBING 30 8mm pre-sewn eye-to-eye prusik cord 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. Where you need a Bachmann knot or a French knot, an eye-to-eye prusik cord will do it well to be a great help for you. The ends of loop / cord are sewn professionally by machine with high strength thread and tightly covered by a heat shrink plastic sheath to guarantee safety in a further consideration. 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.