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[quote="Aladin" pid='565' dateline='1600631659']
Apollo A7L/A7LB Lunar [b]Overboot[/b]

One of the most iconic images of the Apollo program is Buzz Aldrin's footprint on the lunar surface:

[img]http://heroicrelics.org/info/suits/a7l-lunar-overboot/AS11-40-5878-sm.jpg[/img]

NASA photo AS11-40-5880.

The boot which left the footprint was simply called the lunar overboot or lunar boot, one of the few parts of the Apollo spacesuit which did not have a long name requiring an acronym for everyday use. This boot was worn over the main space suit (pressure garment assembly, or PGA) boot.

The lunar overboots were donned prior to lunar surface activity and provided thermal and abrasion protection for the PGA boots during lunar surface operations. The outer layer of the lunar overboot, except for the sole, was fabricated from a woven chromium steel fabric called Chromel-R. Chromel-R was a new fabric at the time and cost (depending upon the source of the information) $2,000 or $2,775 per yard. The Chromel-R was qualified to withstand temperatures up to 1,200° F and also provided a cut-resistant protective barrier between the PGA boot and potentially sharp rocks on the lunar surface.

http://heroicrelics.org/info/suits/a7l-lunar-overboot.html
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