So darn heavy means about 5 lbs per pair, counting 3 0z per boot of custom orthotic. But they get the job done like nothing else. And they are really the only boots I have found where I can wear these orthotics (which completely prevent my plantar fascitis) because the orthotics raise the center of gravity making me all the more prone to a sprain. In fact, the time I sprained that ankle in the Winds, I had a new pair of pretty heavy Asolo that looked really stout, but they could not keep my ankle from rolling with that insert in place. But I don't even come close ( so far ) with this Lowa tech Biomex vertec something or other. I think they have quit making them, as I can't find them.
I hiked today with a light pack and a pair of Vasque Sundowners with out the orthotic. These weigh a bit less than the Lowas, either 1/2 or 1 lb per pair less, I'm not sure. But it is obvious that, even with no orthotic, I can roll an ankle if I try to with these ( for testing, obviously I would not do that on purpose on the trail). But even with the insert, I really can't roll the ankle even on purpose with the Lowa.
Anyway, I hear what every one is saying, this is probably not the time to make a change. It would be nice if someone made a lighter boot with the hi tec ankle thingies that this boot has. Oh well, I'll huff and puff getting them up the hill, but at least my feet will be comfortable and I will be highly unlikely to twist an ankle.