Product Description The double rope technique reduces rope drag and increases fall protection over sharp edges, especially on routes with multiple traverses. This system also offers expedient full-length rappels. Unity is designed for classic climbers who clip protection alternately and for the extremely weight-conscious alpinist. All of our ropes have Endura dry treated cores. Select styles have a Double Dry (2x) treatment where the cover is coated with Endura Dry Treatment as well as the core for the ultimate in dry protection.