I have many, many, many, miles in "lightweight field boots" but when other manufacturers got into the GI boot game, and we could wear something else, I switched in a heart beat to "tennis-shoe boot things" for all the ruck marches we did. Fast forward to being retired from the Army, and I'm not wearing anything I wore in the Army. Of course, I'm not wearing lightweight boots either, something about a reconstructed ankle that needs maximum support while I have a pack on my back, but I wont hate on anyone able to rock the lightest weight stuff possible!