100.000 ft is almost stratosphere. At that height you can see the curvature of the planet on the horizon, only a few men have gone so far.
This strap is a tribute to military aviation. A tribute to those brave men from both sides of the planet that flew in missions that lasted several hours, flying higher, farther and faster. It was a time for records; it was the time of U2, SR71 and many others. Times now ended, but that denoted an era.
Black calf skin with olive drab stitches and edges, just like the flightgear used by flight crews.