Arc'teryx Phase AR Zip Neck Top - Long-Sleeve - Men's - 2010 BCS

Wicks and dries as advertised. Nice light layer, but it does not insulate much at all, which is why it works so well. The cut is Arcteryx perfect and the material doesn't smell as chemical-ly as many poly shirts do. Also, the feel of the Phase is a little slicker than some other Power Dry fabrics. The blue is color is straight out of the toy box.

Creates the perfect climate: warm, breathable, fast wicking, quick drying. Very comfortable on the skin. Perfect piece of gear for aerobic pursuits without getting cold when stopping.

I think I've tried so many brands of long underwear including Craft, MH, Smartwool, Ibex, EMS, Mammut but never found anything that kept me really dry. I've used underwear mostly use my base layers while backcountry skiing so I'm either pumping out the sweat on a climb or cool on a descent. It's a tall order for any garment.

The Phase AR top is far and away the best I've tried yet. Seems to stay dry in all situations and has surprising warmth for a thin layer. I couldn't be more impressed with the piece and immediately ordered up a second top. Well done Arcteryx!!

Fits well and great for my trail runs. Also works well under a windbreaker. Would purchase again.

Great in all kinds of weather. Recently packed it for a football game in the Northwest, and it kept me warm as a base layer with a shirt in an October evening rain.

Still kinda warm out so I haven't had the chance to use it, but the fit is great (5'10", 190 lbs, 42" chest; I got a large). If you're between sizes I'd suggest going to the smaller one, especially if you have a slender build. It's not super tight and the torso/arms are very long. Also, the neck is plenty big even when zipped all the way (17" neck and not too tight).

The material seems pretty neat, too. It basically feels like a t-shirt weight version of a softshell. Added bonus is the collar can be folded down when the zipper's down, just in case you're not cool enough to run it popped.

***EDIT***: So, 9 months later, I have to say the stitching is pretty disappointing. Since I only have to shirts this weight, I used it a lot bike-commuting and running through the Chicago winter. The shirt is a nice weight and has a great feel as an added layer or alone, depending on the temperature, but at least portions (if not most) of the stitching on half the seams have come undone. It'd probably be better off if I only washed it on gentle cycle in a front-load washer, but there's just a 20 year old top-load washer in my basement so no dice.

So, summary: fits great though a little on the slender side, material feels good and the blue is a *sweet* color, but the stitching? Come on, Arc'teryx, use a thread that has a set.

The Phase AR has quickly and single-handedly replaced several other layering pieces including Under Armour, polyester shirts, and lightweight jackets in my wardrobe. Lightweight enough to run under a cycling jersey for chilly mornings, but still warm and comfortable enough to wear on its own for a trail run. Come winter, I imagine it'll be the idea base layer for skiing as well. Haven't had any problem with stink, but then again I tend to stay away from onions and asparagus.

* I'm a lean 6 foot, and the Small is a perfect, against-body fit. piece has a tall zip neck, and runs slim and long - size accordingly

Looks cool, feels warm, fits great. My first Arc'teryx garment. I'm sold.

I wore these in -20C as a base layer with a fleece under my jacket. Didn't feel a thing, infact at times I took the fleece off when the sun came out and the wind die down. But it did smell at the end of the day.
I also have IceBreakers and for the price I would use IB over these anytime. These Arcteryx are pretty expensive.
I gave it 3 stars only because it was warm but I would not buy them again.

Arcteryx does it goood.The soft material size M fit perfect on my 5'9" 155lb frame. The long arms are a plus and no real need for thumb holes. No irritation to the neck when zipped up either.

During a recent single digit cold weather hike I manage to break a good sweat while double-timing. I unzippied to my Phasic AR baselayer and cooled myself, all the while the Acteryx was wicking the moisture away from my skin. This all occured after I had worn the same shirt on six other occasions; three day hikes and three all-day outdoor work sessions. All involved some level of perspiration. Following the day after my double time hike I was threatining to wear the shirt for a seventh time as it had absolutley no odor form any part of the garmet including the conspicious pit area. I could not believe it.
Alas I could not bring myself to wear it without a wash even though I am sure no one would have noticed. Great product.

This top is great. It wicks away moisture while keeping me warm. The material is a bit different compared to a fleece top but it is still soft. The arms seem longer then some of my
Patagonia's. I plan on using it as layer.

I got this piece in the Graphite color in a L. I am 6ft 3in, 190lb with a 43in chest. This is quite a tight shirt. I have only used this as a next to skin under layer and it has worked really well. It you want a more loose fit, I would size up. Another great product from Arcteryx.