The cover of the Ocean Polyester Eye-to-Eye (e2e) consists of braided polyester/aramid, and its core is made of high-quality polyester fibers. This mix of materials makes the Ocean Polyester e2e highly heat resistant. The stitched eye-to-eye loops come in diameters of 8 or 10 mm and are designed to grip a carabiner. These high-quality stitched end terminations permit perfect handling with the DMM Hitch Climber Pulley.