Working at height requires a sufficient level of comfort and efficiency to maximise the time involved on rope. Using a climbing harness to establish short routes on relatively clean rock can be sufficient considering the time suspended in the harness will be relatively short and the gear loops can suspend some tools. Conversely the same approach on big walls can work however a full body harness is not only safer but also more efficient in ascending and descending fixed rope. In tandem with either approach is the method by which rope will be rigged or how the developer will pass any rigging, including others if working as a team on one line e.g. a several hundred metre high wall.