The 9.8mm Fusion Nitro Dynamic Rope by Sterling is the rope to take when you are going for that hard redpoint or onsight at the cliff of choice. When you are taking long whippers with multiple tries, the Fusion Nitro will stand tall to endurance and amazing handling.Climbers all over the world who have used the 9.8 Nitro have claimed it offers total control, smooth clips, zero drag and soft catches. The Fusion series of ropes are a hybrid of engineering and constructions of the Marathon and Evolution series ropes. The result is the lightest, skinniest single ropes in the history of Sterling. The 9.8mm Fusion Nitro Dynamic Rope also is made with their proprietary DryCore technology, that will help maintain the original strength and elongation of your rope in wet or icy conditions. All of Sterlings ropes are treated with DryCore but dry treated ropes then go through a process to treat the sheath and in turn also treats the core again. According to Kurt Smith, Sterlings rep, This is a pain staking process - we double dip the rope and do the treatment twice to really get it to bond to the nylon..