New England Ropes Equinox 9.9mm Dynamic Climbing Rope Very little degradation from sunlight. Can be used outside over long term if inspected regularly. Nylon will degrade with strong oxidizing agents, mineral acids, and 90% formic acid. May discolor when exposed to high levels of carbon dioxide. Nylon melts at 460??????F with progressive strength loss above 300??????F. No blanket safe working load (SWL) recommendations can be made for any line because SWL's must be calculated based on application, conditions of use, and potential danger to personnel among other considerations. It is recommended that the end user establish working loads and safety factors based on best practices established by the end user's industry; by professional judgment and personal experience; and after thorough assessment of all risks.?????_ All of New England Ropes ropes have Endura dry treated cores.