LAYER 21
"TEFLON" TFE-FLUOROCARBON FIBER

Here the "Teflon" TFE-fluorocarbon resin is made into fibers and woven into a fabric of "Teflon."  On earth, because it is almost totally friction-free, you'll find this fabric used in greaseless bearings.  On the moon, it is used on the outermost layer to cover hard-wear parts of the astronaut's suit, such as elbows, knees, and shoulders to provide an abrasion-resistant surface.  About 50% of the space suit is covered with this special fabric.

Taken from a 1970s DuPont poster.