Very nice boot. Almost all leather ( tounge is 2/3s fabric). Great workmanship and materials. 100% waterproof.Boot seems to form fit around your foot. Good lateral rigidity- boot stands almost 8" tall. Moderate flex, good for hiking and light/ moderate backpacking. It is a warm boot, perhaps not the best for hot weather hiking, Too much flex for crampons but it is not advertised as a mountaineering boot. Fits as sized. This is a very good boot for 90% of my needs. It is expensive but well worth it if it lasts. Time wtill tell. One last thing- it's made in Italy!