sorry, i didnt see your reply to my post... just weighed my size 8's... 283 grams each... the upper is a meshy material, it has cross hatching that look like ripstop to me... they breath great, and no dirt and stuff doesent get in ive hiked through dusty dry dirt, and my socks where clean, even though they're all mesh, they have some water resistance, but dry out very fast, the sole is very very grippy, even on wet rocks! although on pavement they feel a bit weird, i was worried about the lace system, but after reading a bunch of reviews with no breaks, and learning they're kevlar laces i feel pretty confident, and since putting about 60 miles on them, i prefer the quick release system, and have not had any slippage of the lace locking device... I LOVE THESE SHOES! FINALLY NO BLISTERS!
I used to wear merrell gtx moab ventilators w/ SOLE footbeds and injini socks... and would still get blisters!, I now wear the speedcross 2's and smartwool phd's, and havent had a blister yet!