Unrelated or pretty much exactly opposite of the boots (just looking like the sole thickness) being discussed in this thread but when I read this news I immediately thought of this thread.
Marines got to try out a few prototypes of gear designed to produce additional energy in the field at the Experimental Forward Operating Base at Camp Pendleton, Calif.
The kinetic boot was one such piece of equipment that might have sounded better on the design board than in the field. The boot produces kinetic energy with every step, but the sole appears balky and uncomfortable for Marines.
“I felt that was a bit ridiculous. I felt like there are other ways, like better ways, to make energy than having something in your boot that’s going to make energy,” said an unnamed Marine who took part in the tests.