I purchased a medium North Face Tritronix II Triclimate Jacket about a month ago from Backcountry. I am about 5'10" and 170 lbs. and the jacket fits perfectly. A large would have been too big. This Jacket is awesome. I have so far worn it in temperatures reaching below zero with the windchill with nothing but a t-shirt on for the base layer. I was completely warm and felt absolutely no wind through the jacket. I can't wait to see how it does in even colder temps.
The snap-in liner is pretty sweet by itself and relatively warm. It looks good also. The outer shell seems to be completely waterproof. I have worn it in several cold Fall downpours and not a drop of rain soaked through the shell. Water just rolls off of this thing.
There is a ton of storage options on this jacket and it has a really neat system for an MP3 player. It has a built in goggle or glasses wipe in the sleeve that you can pull out as well.
I am very happy with this jacket so far. Another great product from the North Face and more excellent service from Backcountry! Thanks!
Josh