Answer:
A full body harness with a tether strap, a lineman's belt, and a suspension relief system
Explanation:
The fall arrest system is a highly standardized safety measure in the construction industry (or any cause that involves climbing). The essential components include a full body harness that has a tether attached that absorbs extra shock. The suspension relief system provides a loop for standing. The frequent additional component is the lineman's belt, which goes around the object of climbing.