I used to buy 845s for 10.5 and loved them but of course NB stopped making them. Was a little worried the 1300s were all leather boots as it's hot here and need my feet to stay cool. After wearing them for a few weeks they seem to stay as cool as the mesh 845 version. The reason for the 4 stars is because the 10.5 I got was closer to a size 10 and I got them had to return for the 11th. Also, the tread pattern is not as aggressive as the 845 and is really slippery on some surfaces like fast food restaurants and restrooms. Otherwise I like them so far. NB please return 845!