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Polartec Power Shield O2 fabric combines a tight exterior weave and high-loft interior to give the Arc'teryx Women's Hyllus Jacket the ability to combat most chilly conditions. This fleece jacket takes on days of frigid temperatures and light snow, and you can use it as a heavyweight mid-layer for those really nasty days. This Arc'teryx jacket fights off light rain or snow, doesn't pill, and still provides enough breathability to keep you from overheating when the going gets strenuous.

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great ascent jacket

    I love this jacket. It's just the right weight. I have a heavy fleece that's too warm for most days of backcountry skiing etc. This one seems to be perfect for ascent. The only concern is that the arms fit tight, but I should need a heavy layer underneath.


      The Arc'teryx jacket did the job--it was good for hiking days when the weather was not too cold. However, it was not warm enough under my Gortex jacket on the cold days (5 inches of snow at the 18,800 foot Crater Camp on Mt. Kilimanjaro). One thing I wish they would change is the sleeve. It was too tight to push up and help thermal regulate, i.e., when you start hiking you want to cool off a little but not remove the jacket. A zipper in the sleeve would have been great.


      Perfect for the Northwest

        This top is snuggly and warm on cold days, and fits easily under a shell on especially rainy, windy, and freezing days. The fit is very close without being restrictive (I'm 5'2", 120lbs and have the xs) although the sleeves seem slightly short. Personally, I prefer a little shorter sleeve length so that it fits under a shell without bunching at the wrists. I wear this for wintertime running and hiking and have yet to feel the cold. I live in an extra-windy portion of Washington, and this jacket handles the wind and lighter rains very nicely.


          I find that this jacket is my go-to for days that are not snowy for hiking and skiing, it's a perfect heavy layer to wear for the descent. On crappy weather days, it still fits under my shell w/o the bulk. It's just barely the right size (large) for a taller woman (I'm 5'11''), but has better arm length it seems than other ArcTeryx tops that way. It's also a great town jacket.

          Does it have a drawcord hem on the sides...

          Does it have a drawcord hem on the sides or in the front? Is the drawchord hem on both sides? or only one side?