Oceans Polyester split tail friction hitch from Teufelberger. Ocean Polyester single eye split tails are a popular friction hitch for professional arborists. This prusik has two tightly sewn eyes, which fit snugly over many oval carabiners (fits a DMM Oval O perfectly), to keep everything nice and tidy. Ocean Polyester is made from a combination of Aramid and Polyester fibers for the sheath, with a polyester core, which give it great heat tolerance, high abrasion resistance, and nice gripping features. 10mm Ocean Polyester works best with 1/2" (12.7mm) climbing rope.