Ocean Polyesters combination of heat tolerance and grip is provided by its combination of Aramid and Polyester. The stitched eyes are sewn by the experts at Rope Logic. Select your length. The strength of Ocean Polyester comes from the core, and for tree care, the Treemagineers have introduced a Polyester kern because of its high abrasion resistance, tolerance of flexing and high wet strength. This is an excellent cord for the professional tree climber. Diameter: 8mm MBS: 23kN* *This product has been designed and break-tested for use in a closed hitch system. The cordage unspliced is rated at 22kN.