Climbers primarily use dynamic climbing ropes when a fall could potentially happen. A nylon over nylon rope with a kernmantle construction is how dynamtic ropes are designed. We carry New England (Teufelberger) Maxim dynamic climbing ropes are designed to have a high energy absorption with a stable design. Maxim ropes are manufactured with a dry treated core. If you need a dry core and a specially treated dry cover, try Maxim's 2X Endura Dry Ropes.