These boots are surprisingly heavy and solidly constructed - but wonderfully comfortable, as I have come to expect from Keen. Two minor tips. These are the first Keens I have had to choose a whole size bigger than my foot size because they are so small-fitting. A minor niggle, as others have found, is that the laces tend to come loose early on a hike. I found that threading a shoe lace through the top eyes and tying them last keeps everything tight all day. Highly recommended boot.