<p>You'll be getting almost all of your blisters from the low-quarters, not the boots. You will RARELY be in ACUs the first 3 weeks. 2nd Detail you'll be in them the whole time, but the boots are so comfortable it shouldn't be that big of a deal. I didn't break in my boots at all beforehand. You'll find that after long rucks, it's the bottoms of your feet that hurt. I'm not really sure why, but they do.</p>