These pants would not stand up to a belly crawl, but I try to avoid that activity, anyway.
I had an old Marine Corps vet in my seminar today and he told me that he wore uniform pants much like these. By my time, the uniform trousers were ultra-starched, camouflage, cargo pants. I would have preferred trousers like these. (But I think silk would have been highly impractical.)
Sweater, Covington (thrifted). Pants, Lauren Ralph Lauren. Boots, Vionic. Necklace, made by my friend. Blazer, vintage.