Ima 10.5 US and I got 10.5 in tachyons and for hard use mine word down in about 18 months. I would say the lowas are more buy it for life mine went through a deployment and hundred of hours of training and still feel brand new

I have two pairs of tachyons on in black and one in sage green some of the best boots I’ve owned and by far the lightest. I personally prefer lowas zephyrs but they have the military look