Ultrex is a 12-strand single braid of 100% Ultra High Molecular Weight Polyethylene (UHMPE) fiber enhanced with Yale's Maxijacket HP coating supplying superior abrasion resistance. Ultrex's braid angles and twist level are designed to optimize break strength and keep stretch low. UHMPE is the most forgiving high modulus fiber giving better bend over sheave cycling capabilities than other high tech fibers. Ultrex has zero water absorption and maintains its flexibility even in freezing conditions. As is the case for all Yale ropes the strengths shown in the charts are for spliced ropes, and the splice technique for Ultrex is very easily mastered.