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Arc'teryx created the Men's Aphix Insulated Jacket for those who need to travel fast in the mountains despite the bitter cold of winter. Coreloft insulation is lightweight and allows the Aphix Jacket keep you plenty warm, but this jacket still packs down small enough to fit in your day pack without gobbling up every inch of space. Alpine climbers will love the water-resistant coating when a storm rolls in, and backcountry skiers will revel in the lined collar that keeps the draft off your neck. 

  • DWR coating shrugs off light moisture and precipitation so you can depend on the Aphix as a stand-alone jacket or a cold-weather mid-layer
  • Coreloft synthetic insulation is lightweight, and the insulation compresses and regains its loft quickly so you won't have to worry about cold spots after tightly packing this jacket
  • Stretch side panels allow full range of motion at your core and underarms so you can reach or stretch without feeling held back
  • Cuffs stretch over light gloves in order to seal out the elements
  • Insulated handpockets and a lined collar complete the toasty-warm package

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Here's what others have to say...


Monkey Arms...

    First of all, let me say I ALOMST LOVE everything about this jacket!!!

    Material: Arc Quality, AWESOME!

    Warmth: PERFECT for 45ish deg weather or use it as layering for those cold days.

    Style: Very stylish, even for office days.

    Fit: here we go... length of this jacket is GREAT for snowsports. it hangs down a couple of inches below my waist,.(PERFECT) The jacket is "fitted' but not that crazy, Jersey Shore wearing 2 size too small "fitted". Here's my one and only complaint, the sleeves are CRAZY long... (I don't have C-Lo arms aka T-Rex arms.) I'm 5'-9" 170ish and in dress shirts I wear a 16 1/2 with 34/35 sleeve. I have to roll the sleeves up about 2-3 inches... I LOVE this jacket but this might be a deal breaker...


    Beautifully made, nice jacket

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

    Bought this just BEFORE it went on sale. But rather than returning it I decided to keep it and wear it and now I love it.

    The sides have vent panels which breathe nicely when active outdoors. This is great when you are active, but you need to make sure your layers are appropriate for your activity because if you are not active and wear this in 30-ish degree weather you will be too cold. Hike in 30-ish weather an stay active and its going to be a good jacket for you.

    The sleeves are LONG.

    The body cut is LONG, which is a great asset as it keeps your lower torso warm even when you bend or are active.

    The shell material is not water proof, but light snow will generally not melt into the fabric. It sheds light snow, but not wet snow or rain.

    The internal pocket zipper is conveniently placed, but the fob is TOO SMALL to use with gloves and could use a fabric extension.

    Overall I really love this jacket, the quality of the materials are top notch, the jacket is very comfortable and very useable. It layers well under a shell and adds a level of warmth and insulation when the weather demands it.

    It is designed for ACTIVE wear and buyers must be aware that this is not a jacket for sitting outside in the cold. Its a jacket for being active hiking or running or snowshoeing outside in the cold.

    Did you purchase from here? They will credit you back that amount it went on sale for, if the size and color you ordered went on sale within 30 days of purchase, FYI .


    Different from Atom LT & Nuclei

    • Familiarity:I've used it once or twice and have initial impressions
    • Fit:Runs large

    I own all 3 (hoody in Atom LT and Nuclei, jacket in Aphix). If you are considering a light synthetic insulated jacket, Arcteryx makes some of the best. If you are considering Aphix jacket specifically, here is what you need to know.

    Aphix is part of Arcteryx's "white line", meaning that it was designed with snow sports in mind. What make it a good snow sport jacket?

    1. The cut is longer, quite a bit longer than the other two. It goes down to my hip, providing greater coverage.

    2. It is thicker, and feels thicker than the other 2 because of the 80g/m^2 coreloft vs. 60g. This difference is most significant in the arms. It feels slightly warmer than Atom LT.

    3. The face nylon fabric is more "wrinkly". It is not the tissue paper textured material like in the Atom LT.

    4. The arms feels much longer than the other 2 in the same size because (a) it is longer, (b) there is no stretch material at the wrist cuff, so the cuff tends to slide down.

    5. All the way from the wrist to just above the hip, a hard-face fleece material provides breathability. I haven't try Aphix in high exertion mountain sport yet, so cannot comment about this. It will be mad if it breaths better than Atom LT, because Atom LT is amazingly breathable. Aphix is definitely more breathable than Nuclei.

    Overall, I give the jacket 4/5. It is a nice looking jacket and fits well. The worst part is the cuff. I plan to use this jacket for general hiking in colder climate, and snow shoeing.


    Nice Jacket

    • Gender:Male
    • Fit:Runs large

    Ordered this jacket as a toss up between the Atom LT and this one. After finding a shop that had one to be able to go through them, I ended up finding that I needed a L in the Atom and only a M in the Aphix for a good fit. Not too loose, not too snug in either case. This fabric is also a bit tougher seeming than the other one, which makes sense, as that is what other's have said. I did not like the hood at all, so I went with the hoodless one and I'm pretty happy with it. I'm 5'11", 180# and relatively in shape, and a medium is big enough to fit a layer or two under, but honestly, you probably only want a layer or two under, because it's really warm... like you put it on indoors and you begin to heat up kind of warm.

    How much longer is this when compared to...

    How much longer is this when compared to the Atom LT? I heard the sleeve is longer and and the length is longer too. I'm a short guy at 5'5, and the Atom LT fits me fine with size small when I tried it at a store, would this one fit me as well? Thanks.

    Best Answer


    The length of the Arc'Teryv Aphix is longer than the Atom LT in both body and sleeve, but the difference is negligible. In the torso the Aphix runs about .25" longer and in the sleeve the difference is about half that. The biggest difference I noticed is that the Atom LT is part of Arc'Teryx's trim fit line whilst the Aphix is an athletic fit. Another small distinction, but worth trying on if you have never worn something in their athletic fit to compare to.

    I would also encourage you to check out this blog post for a more thorough comparison:

    I have an Arc'teryx Epilson AR in medium...

    I have an Arc'teryx Epilson AR in medium which is a slightly loose fit, what size should I be looking at in the Aphix?

    Best Answer

    I found the Aphix a little more trim in the chest area than the Epsilon. But overall you should be the same size

    The Epsilon AR and the Aphix both have an athletic fit and sizing would be comparable between the two. If you liked the fit of the Epsilon AR, you would be fine withe the fit of the Aphix.

    Can anyone compare this to the LT hoody...

    Can anyone compare this to the LT hoody and SV hoody? I have an LT and considering an SV for general winter wear and warmer ice belays. I like the idea of this being a stand alone jacket and can be layered over. In that aspect, it appeals more than the SV. I realize the loft is In-between but what is it closer to with the fleece sides? Also, it looks real long? Thanks.

    In case you're still looking for the answer:

    So is the fit actually slimmer on these...

    So is the fit actually slimmer on these than compared to Atom lt? If I wear a small in Atom lt should I try a Med in this? Thanks.

    I tried on the Atom LT and the Alphix Hoody in a store today, and the Atom LT is more fitted. I am 6' and 172 lbs and I thought the medium Atom was a bit snug, but the medium Alphix fit well. I wear a medium in most Arcteryx jackets.

    NO! I have an Atom lt in medium, which fits me perfectly and an Aphix Jacket in medium, which is a full size too big. I find there's not a lot of consistency in the Arcteryx sizes - small is perfect for me in Theta shells and medium is perfect in Fission AR and Atom lt. I'm 5'9" and 155lbs. Whilst the Aphix is fitted you should definitely stick with small.

    Are these longer in the torso than the...

    Are these longer in the torso than the Atom LT jackets?

    From the measurements in the specs and from other reviews I would say yes they are.