Mil-spec 'big H' history...
Silk was so important that its trade probably changed the world history more than any other technology. The famous 'Silk Road' connected Europe to the Far East during the middle ages, and this brought together global knowledge that advanced civilization and helped begin the renaissance.
Strategic military considerations, not demand for fashionable garments, caused the establishment of this trade route. During the middle ages front-line soldiers lived, traveled and fought wearing coarse tunics and outer uniforms. Silk scarves allowed soldiers to close their protective battle (and outdoor survival) garments tightly around their necks without chafing or discomfort, so they could fight better and travel farther. This was a true battlefield advantage.
As recently as World War I this remained so. Early planes and cars were all 'open cockpit'. Soldiers still lived and campaigned outdoors for weeks at a time, and this meant wearing heavy gear. After the war civilian pilots, race car drivers, motorcyclists and movie idols (Douglas Fairbanks, Errol Flynn...) further enshrined silk scarves as garb synonymous with bravery, courage and endurance.
Then airplanes and cars became enclosed and military dress adapted. Soft, slippery scarves became unnecessary. Silk's swashbuckler history and function was not only forgotten, it became a laughable cliché. Something only worn by old men.
The last vestiges of the silk scarf's centuries-long military role evolved into the fashion of men wearing neckties with their sport coats, blazers and business suits. Silk scarves had become decorative neckwear. (Now you know where neckties come from.)
That's sort of a sad ending for such an important habiliment -- except once again riders have rediscovered how great these scarves work when worn with modern riding gear closed tightly around one's neck. Once you've tried wearing one, you'll never look back. Make some history.