Just got a pair of the new Woolrich "lightweight" pants. Part number 4441 in khaki.
My first impression is, WOW.
These are mega comfortable. I am heading to Mexico in a couple days and these will going with me. I suspect that when I am not in shorts, I'll be trying to wear these things out.
I've no idea how they'll hold up compared to the 4429's that I like so much. Obviously they should not be as durable but time will tell.
They have all the same pockets and the belt loops that I always complain about (when they're missing) as the 4429's so the Wilderness belt / Alessi CQC/S combo sits exactly where I want.
Unless they disintegrate or something, these will be awesome Summer pants.
I'll report back in a month or so when I've got some miles on 'em.