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Trim, warm, and fly enough to wear into town.

Layer the Arc’teryx Men’s Delta AR Zip Neck Shirt over a baselayer, under a vest, under a jacket, or just wear it on its own. A high-loft fleece inner face provides exceptional insulation, and a smooth grid outer face slides smoothly under a shell jacket. This shirt packs down so small, you almost need a magnifying glass to find it in your pack. But pull it out, and voila—you have a handy warm layer to keep you comfy while you belay your climbing partner or settle in to evening camp.

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Here's what others have to say...


good fleece

    it is actually athletic fit ,not trim fit as advertised,so it is a little bulky,but comfortable and warm.


    Durable, but a bit bulky

    • Familiarity:I've put it through the wringer
    • Fit:True to size

    This is a durable fleece that will definitely keep you warm, however I am not in love with the fit or the volume. It feels very bulky around the waist area as well as the arms. I am 5'10 185 and own a Medium. I am hesitant to say the fit runs large, because it does not (just very oddly shaped) The performance of the fleece is great, just not the best looking fleece when worn in the world (in my opinion). They need to redo the measurements.


    Great fleece, just wish it was windproof

    • Familiarity:I've used it several times
    • Fit:True to size

    I live on the coast of Central Florida where strong wind is a daily occurrence (10-20 mph) and temps get to the 30s and 40s during the winter months. This is a great fleece, half the thickness of a normal $50 fleece, but definitely warmer. Thin fitting so fine for me. I wish it was windproof, with a thin layer of goretex adding no bulk but wind protection. So, although warm, once the wind picks up it feels a lot colder then skiing in the Rockies on a calm (no breeze) 20 degree day. I like the fleece I just wish it was windproof. I'm 5'11, 145lbs, got the Medium and fits just fine.

    thats why they make shells.....fleece is an insulating material.

    The Fortrez is actually wind resistant but not to 30-40mph. Try it out. But then again it would be nice if arc'teryx made a wind pro material in one of their jackets one of these days.


    A nice pullover but too hot for layering

    • Familiarity:I've used it once or twice and have initial impressions
    • Fit:True to size

    I got this zip for Christmas and I love it. I use it around the house when the temperature drops and I plan on using it for Spring backpacking at night. As a stand alone piece it is very warm and pretty durable. However I would not use this to layer unless you are visiting the South Pole. It doesn't breath very well and makes for a hot and sweaty mess. I would walk into town in this alone in 40-50 degree weather but any lower a jacket may be in order. Overall very good quality and warm/comfortable.

    So has the fit changed over the years? ...

    So has the fit changed over the years? The pictures look to be pretty athletic. I want to try this but I don't want a baggy fit. I have an atom lt in a small and it's trim. Thx

    I do not believe the size has changed. I'm 6'00 and 175ibs and I wear this in XL. It fits me very we'll not to tight not to baggy.


    Warm, durable but bulky

    • Familiarity:I've put it through the wringer
    • Fit:Runs small

    I am not sure why I have to 2 set of Delta AR: Red and Black in color. I have a hate and love relationship with it. It really keep you warm in winter, durable after many years and washes. I used it few times as mid layer but they don't breath very well and you will sweat after long hike and get uncomfortable. Maybe suitable for short walk as a sweater over T-shirt. I just use it now for home use. Also, too thick and bulky for travel. Pricy but very quality is really good.


    Pretty good

      This fleeces is much heavier than its cousin, the lt zip. For me, this one oftentimes gets too warm. I love the waffle fabric, but it just overheats very easily. Plus the fit is different than most other arcteryx pieces. Good, but would rather wear the lt zip.


      Did not like the shape

      • Familiarity:I returned this product before using it

      I have several Arcteryx fleece sweaters, all in XL. This model, however, had a wierd fit. It was wide and short, and did not look good on me. I returned it, and will stick with my other fleece sweaters instead.


      Great layering piece-Warm. lightweight

      • Familiarity:I've used it several times

      I used this over a Stoic 150 merino bliss shirt on a backpacking trip and only had to put my down jacket on once. It got down to the high 30s. This thing is WARM! Very lightweight, too. I think this particular model is being discontinued, so you better jump on it while they are still around.


      Mid layer for sure

      • Gender:Male

      I love the comfort and warmth that this mid-layer provides. Aside from base+shell, this provided me enough warmth through several alpine mountaineering days. I'm 5'8" 140 and a med. fits with a little room. Super breathable and therefore allows wind penetration.



      • Gender:Male
      • Familiarity:I've put it through the wringer

      Hands down this is the best piece of outdoor gear I own! I've had two of these since 2007 and they are still going strong. I abuse them, stuff them in backpacks, dry them on hot, and they just keep asking for more. No problems with zippers or piling of the fleece.


      Fantastic fleece

      • Gender:Male
      • Familiarity:I've put it through the wringer

      Bought this one a size up because it was a little snug.

      All around amazing piece!


      Warmer than you'd think

        Fantastic fleece, very comfortable. I love the waffle knit. Its thicker and warmer than it appears, though it breathes quite well once you warm up. The zipper is the perfect length, allowing a deep enough opening to get some ventilation going when you get too warm. The velour cuff and collar liners are a nice touch. I find myself reaching for it on chilly nights when I want something cozy to sit around in. Its got that kind of security blankey kind of vibe to it.

        The only downside is that it does not pack down small. Its bulkier and thicker than it looks. It takes quite a bit of effort to get it down to the size or a cantaloupe (I wear a large). However, its a fleece, that's how fleeces are. I wouldn't take it backpacking, it too bulky and heavy. But for a day out when you know you'll need some warmth, both sitting around and moving, this is a primo fleece.

        Its fit, while still athletic, is a little more casual than some of their other pieces, so layering over it might be tough. Layering under it would be great though.


        Good mid layer

          Climbed mount saint Helens dec 18, 2011. This is the garment I wore as a mid layer. Way to hot for me. Had to just use as an out layer. Wicked moisture really well and pushed to the outside of garment. Once cleared wood line had to change to different mid layer all together, but only because I'm particular and sweat way to much. Since then just wear garment out and about around town. I'm 6'1" 175 and large fits perfect.


          Go To Pull Over

            This is one of my favorite pieces of outerwear that I own. It has very soft fabric and it feels good on the skin. Its a great layering piece, but is also awesome to wear on cool spring and fall nights. Its is also stylish enough to wear out to the bars. I only give this 4 stars instead of 5 because it is a thermal fleece so it doesnt block any wind and i did wash it once and found a hole after around the neck. otherwise it is a great piece.


            totally worth it

              I absolutely love this fleece jacket. This and a base layer was the only thing I needed on my 3 day hike in the Grand Canyon in March when there was snow on the top and temps were reaching mid 30's.

              totally worth it

              Very warm!

                You should see just how cool the Gold Medal color looks in real life. I don't know how many people ask me where I got this and tell me how good it looks (not to brag). The very first thing I noticed when I tried this on was that this is WARM! I almost didn't need any other jacket or sweater when I was walking around outside in 30degree weather. The texture is extremely soft and looks great too. It is a little pricey for what you could get for another brand or whatnot but as with most anything Arc'teryx, it is very very nice quality. You spend a little more money for something that will last ALOT longer. I highly recommend this.

                How does this compare to the Patagonia...

                How does this compare to the Patagonia R2?

                Best Answer

                the Delta AR zip will offer similar warmth when worn under a shell. It's probably slightly bigger when packed. Either top will offer the same amount of weather protection when worn alone, which is to say, not much. With the Delta AR you don't look like a walking bath mat.

                I agree with Brandon about the bath mat look.This is a very thin but warm fleece that I ended up wearing over and over because of it's warmth to weight ratio.I own almost every fleece Arc'teryx makes,and aside from the Apache AR,this is my favorite for fall by itself and in the winter under my Alpha SV jacket.


                solid midlayer

                  This is another surprise from Arc'teryx-I knew I'd get great,super high quality gear from the bird co.,but this just iced it. Warm,very comfortable,deep front zip,but what did it for me is the warmth to weight ratio and the fact that it's so thin-but really keeps me warm.Easily as warm as other heavier weight fleece that I have.One of my best,and quickly becoming a favorite.
                  I have other 100 weight and 200 weight polartec fleece from other companies that don't hold a candle to this one.It's the warmth to weight that really does it.I'm a minimalist when it comes to clothing (travel light-freeze at night)so this can take the place of two midlayers stacked.


                  nice, but pricey

                    great fleece. my husband wears it almost constantly. the price seemed a bit high, but most things from this brand are.