First off, the jacket blocks wind like a champ. In San Francisco, the wind gets pretty strong in some places and I haven't felt bothered by the wind while wearing this jacket at all. The material is very light and packable. It does tend to get chilly on cold dry days, but I don't think this jacket was meant for those days. Carry a layering sweater and you'll be fine in the city. The sizing fits perfectly and true. It is cut slightly shorter in the front about an inch.

I received this jacket as a gift. I am 5'10 210 lbs I have a XL and the fit is good nice a loose, I don't like them too tight. I use it for trail running and it blocks wind good and is warm enough for me to just wear a t-shirt under it while running in 25-50 degrees. Also a nice every day jacket. The only problem is that the stitching is coming out on the sleeves; not surprised since it was made in CHINA. Arc'teryx should stick with Cananda made. I own a lot of Arc'terxy gear all of it is good except the stuff made in China. I have stuff made in Cananda, Thailand, USA and its all good.

This is just a fantastic jacket. It weighs next to nothing, blocks the wind very effectively due to the Windstopper material, breathes just enough, and it's thin enough to wear as a mid-layer on colder days. It also looks great when you wear it, which is something that Arc'teryx always seems to get right. For me this is the perfect jacket for DC where I live, because it rarely gets frigid here, and I hate wearing heavy jackets. This feels like wearing a comfortable shirt and I can wear it a good 7 months out of the year. I also got it on Sale at Hudson Trail Outfitters in Rockville, MD for $150! Can't beat that!

After being somewhat disappointed with some of Arc'teryx latest offerings (don't they make anything in Canada anymore?), I can definitely say that this is a must have jacket. The athletic fit is like having a 2nd skin and it does keep the wind out. The only reason why I didn't give it 5 stars was the lack of a pocket up near the chest area (either inside or out) to carry an iPod.

Well Done Arc'teryx!

This is great running jacket for winter time. I tried Nike, Asics, and ended up with Arc. I run in the city road maybe 3~5 time /wk, and needed something solid to wear during winter training season (read as off season). This jacket keep wind out, and has good enough warmth. The only downside is the material making noise while running, I guess that's the windproofing. I'd also hope that they will add an extra pocket on bicep or chest to carry a MP3. Oh, and pricing was VERY good, even compare to mass produced Nike or Asics....can't belive I spend more than $20 for running jacket. Haha.