Arbor-Plex climbing rope combines polyester and polyolefin fibers in a 12-strand dura-tite construction. The dura-tite braiding process tightens the braid to keep the rope round and firm for knot control, and allows the strands to be snag resistant.The outer polyester fibers have Samson's parallayfiber orientation that prolongs rope life by minimizing the sawing action of rope over rough surfaces. Arbor-Plex offers the best in performance versus price in a modern tree climber's safety line. Any way you go, you'll work with confidence on all of our 12-strand arborist lines. Climb safely!