This tether was used by Neil Armstrong to to support his feet during a single rest period while on the Moon during the Apollo 11 mission. Tethers were also used to exit and reenter the Lunar Module and to secure an astronaut or their equipment to the spacecraft during tricky procedures.
Learn more about this tether and other objects discovered in Neil Armstrong's closet on the blog: the http://blog.nasm.si.edu/highlights-from-the-collection/the-armstrong-pu…
Promised Gift from the Neil Armstrong Family