A pair of traditional leather boots that were stiff and sturdy enough to support me through anything and last long enough to be buy it for life. The pair weighed over 5 pounds. After 6 months they still hurt after a hike and I gave up breaking them in. Cost me over 300€, and I replaced them with a pair of 80€ trail running shoes which were better in every way for my use case and also lasted 12 years.
The blisters one will get with that is crazy. Especially if you're in the army and can't stop willynilly.
I once marched 12km with bleeding blisters the sizes of small apples and had gone through all the skin layers because if I had stopped I would've had to stay during the weekend to do it again.