Boots boots boots...
For years Bellevilles were the only authorized flight boots in the Army. Then, Rocky finally got there's approved. THEN, the Army switched to the Coyote brown color boots, which when faded from use looked the same color as the old tan boot.
The Coyote brown Rockys were not approved. It took almost 18 months for them to be approved. In the mean time, we were supposed to wear the Bellevilles. They really hurt my feet. (I ended up service connected for pes planus plantar faciitis and calcaneal spurs.)
We had a smart ass copilot (PI) who NEVER could progress who would use whatever means, related or not, to bash IPs. He went after my Rocky boots. I actually had to put a pair of Bellevilles in my office and hide them when I went flying (without him) so he would think I wasn't wearing the Rockys. I still have an unused, pristine pair of Bellevilles in my closet. I won't even wear them working in the yard or hiking. After 26 years of wearing flight boots, I would advise anyone to do what they can to wear comfortable, properly fitting boots. My feet still hurt, despite using $300+ custom 3D printed orthotic inserts.
This ends my short threadjack on Belleville boots.
Look closely at the attached picture of said PI.