Eh only about 50%, probably less, of the Knox 440 is actually leather. Amazing shoe though, I just got them in yesterday.
got a pair of the tom knox 440s 2 weeks ago. broke in quick, good ankle support, good boardfeel. sole is already feeling a little soft tho, was hoping itd be more durable/padded. i've honestly had vans that kept their padding longer, and the whole reason i switched to NB was to try and get more padding under my feet. after reading threads here i got the ipression that the 440s were a really good middle ground between vulc boardfeel and cup padding. that seemed to be the case for my first 5 sessions or so, but not anymore.
also, i underestimated how warm my feet would be in leather high-tops. if i lived somewhere cold this would be a huge selling point, but i recently moved to LA and therefore my feet are sweating like hell. that's my own mistake i guess, whoops.