Sterling Aero 9.2 mm XEROS is a top-of-the-line, triple-certified climbing rope. You can in fact use it as a single rope, as a half and as a twin. With a diameter of 9.2 mm, a super resistant outer sock and a light core, Aero is really handy and allows you to give your best on the crag, but also on mixed and ice. What sets it apart from the competition most is Sterling's exclusive XEROS technology, which takes the Dry rope concept to another level. Unlike other treatments that make only the outer sock waterproof, Sterling has developed an innovative production process that allows you to treat every single fiber that makes up the rope, from the core to the outer sock. In concrete terms, this translates into safer and more performing ropes in humid conditions, which leave you the freedom to focus on climbing without worrying about your safety. Sterling Aero 9.2 mm XEROS climbing rope