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  • Arc'teryx - Alpha FL Jacket - Men's - Lithium
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  • Arc'teryx - Alpha FL Jacket - Men's - Lithium
  • Arc'teryx - Alpha FL Jacket - Men's - Blaze
  • Arc'teryx - Alpha FL Jacket - Men's - Adriatic Blue
  • Arc'teryx - Alpha FL Jacket - Men's - Bamboo

Arc'teryx Alpha FL Jacket - Men's

sale $279.30 - $399.00

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    26 Reviews


    A minimalist fortress for fast-and-light alpine ascents.

    Lining up 12 pitches in a day is a serious endeavor, and while you'd prefer to do it in perfect weather sometimes that's not just how things go, so you need an ultra-light rain shell like the Arc'teryx Alpha FL Men's Jacket. The lightest Gore-Tex Pro jacket that Arc'teryx makes, the FL (Fast and Light, if you were wondering) is the speed demon of the climbing-and-alpinism-oriented Alpha series, with a lightweight 3-layer design, waterproof and breathable membrane, and taped critical seams to keep you dry without any extra bulk. 

    Unlike average shells, the FL is designed specifically with climbers in mind. It has a trim fit to eliminate any extra material, and an e3D ergonomic design that's articulated in all the right places to facilitate climbing movements The slim profile also makes it easy to see your harness, so you don't waste time and energy trying to grab piece of gear from it, while the removable HemLock foam hem inserts keep your jacket from sliding up under your harness and leaving you exposed. The helmet-compatible StormHood adjust with a single-handed pull, and the entire package stuffs into the zippered, harness-compatible chest pocket and clips onto your harness with a webbing loop, making it easy to carry and quickly accessible when the clouds gather.

    • N40p-X Gore-Tex Pro 3-layer waterproof and breathable membrane
    • Taped critical seams
    • Trim fit with e3D ergonomic and articulated design
    • HemLock removable inserts keep the jacket under your harness
    • Helmet-compatible StormHood
    • WaterTight front zipper
    • Stuffs into chest pocket
    • Webbing loop for clipping to your harness
    • Item #ARC000Y

    Tech Specs

    [membrane/laminate] Gore-Tex Pro (3-layer), [face fabric] 40D nylon plain weave, DWR coating
    Fabric Waterproof Rating
    guaranteed waterproof
    Fabric Breathability Rating
    guaranteed breathable
    trim with e3D
    yes, helmet-compatible StormHood
    1 zippered chest
    critical seams taped
    Claimed Weight
    [medium] 10.9 oz
    Recommended Use
    climbing, ice climbing, alpine climbing, expedition climbing
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Exactly what i was looking for

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

    Excellent fitting jacket that won't get in the way during backcountry skiing and should breath amazing, which should be a life saver as someone that runs super hot. I don't think vents do much of anything so the lack of them doesn't bother me in the slightest and is honestly just one less place to fail. i bought a medium and a large just in case but as others noted i should not have doubted the fit chart, it was dead on. ended up with a large and i'm an athletic build 6' 185lb guy.

    Great (So Far) In Every Way

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

    This seems to be exactly what I was looking for in a hardshell. I generally like to ski in a softshell, but when there's a lot of precip I get a bit wet. I wanted a light but bombproof shell for those days and this jacket will obviously function well beyond those expectations. There are lighter 'emergency' shells out there, but for a 3-layer GORE-TEX Pro shell with superior weather protection, this one is pretty hard to beat.

    The features are few on the jacket by design. The hood cinches, velcro cuffs and zippers are all of high quality as you'd expect from a garment that retails for $400. The HemLock inserts are really a nice touch for use with a harness. The hood itself is great with or without a helmet, as others have observed. The fabric is pretty crinkly and noisy without much if any stretch. It doesn't feel too bad against bare skin, but it doesn't have any kind of supple lining in it like other jackets either. It's a fairly austere, minimalist fabric, which is great if that's what you're looking for.

    As for fit, the small is ideal for me. I think if I were much taller I'd want a longer hem. If I had more slightly built upper body I might have opted for the x-small. The arms are a longer cut as expected from a climbing-focused garment. There's a fair amount of fabric around the shoulders that makes the jacket seem a tiny bit billowy there. However, the reason is clear as with light to medium layering underneath the mobility is excellent and this trade-off seems totally acceptable to me. I have a muscular build and sometimes have trouble fitting jackets (often they're way too long whilst still being restrictive) but this one is awesome.

    I can't speak to durability yet but so far I'm impressed. My first foray into the Arc'teryx brand seems like a winner.

    The bee's knees...

      The Alpha FL is a near-PERFECT hard shell jacket!

      Bombproof construction and materials, unparalleled fit, fairly light in weight, and multi-purpose in utility. The Alpha FL will keep you warm and dry while skinning up AND skiing back down, climbing wet water ice, or waiting for the bus in a torrential downpour. It works well for climbing, for skiing, for hiking... For just about anything outdoors and in all sorts of inclement weather.

      Previous model was better.

      • Familiarity: I've used it several times
      • Fit: Runs large
      • Size Bought: Large

      I used the previous Alpha FL (2013) model for skiing, ski touring and climbing. I was really happy with the jacket as it was super light, packable, breathable and the fit for me was superb. A little stretch in the material really improved the comfort and function. I had to replace it recently as it was no longer waterproof, but considering the use I had given it I had no problem with that. The new version has no stretch and is very "crinkly" and not as easy to pack. The fit has also totally changed, the arms are still long (good) but the volume is so much larger and I really don't think that people buying this jacket would want that ? FL to me means that I'm working hard and will probably at most wear a light "puff'y" underneath. I'm really disappointed in this jacket, mainly concerning the change in fit.
      I am 6'1", 182lbs, 32' waist 43" chest, long arms, typical build for climber, Skimo

      Arc'Teryx is top notch!

      • Familiarity: I've used it several times
      • Fit: Runs small

      You get what you pay for. I've had my Alpha FL jacket for a year and a half and it's never let me down. So much awesomeness. Best piece of outdoor gear that I've ever owned. I will eventually get an Alpha or Theta SV... just to have THE bomber outdoor shell (when I find one at a tempting enough price), but seriously... the Alpha FL is just an amazing piece of gear.

      What an amazing jacket

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

      So I wanted to invest a little extra money and get something I'd have for a while and this was a great investment. After punting on Ka'au crater because of rain, I started carrying this with me everywhere and it's been absolutely worth the money. I bought one that I thought would be a little big on me so I could layer and it was a good call. Even with it being a little big though, I can adjust it enough that it fits almost perfectly. As far as sizing goes, I'm at a perfect size where most larges feel a little small and most extra larges feel a little big but this is adjustable enough that I feel like the extra large fits me perfectly with or without extra layers. It's light, it's breathable, it's comfortable, it fits great, it's durable. I come back from a torrential downpour and I'm completely dry. Absolutely love this jacket and would recommend it to anyone.

      From Mt Rainier to Portland

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

      I owned this jacket for about a year and like with all things arcteryx it still looks new. From the tops of Mt St Helens and Rainier to waiting in line at voodoo donuts. This jackets is perfect for everything when layered right. I use it with my Atom LT and can brave a low teen day. Only reason for 4/5 is the stuff sack is pointless with no attaching point and I lost it in the first month.

      Very satisfied with my Arcteryx Alpha FL

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

      I've had this jacket for about a month, and it definitely lives up to it's hype. It has done well to keep me dry during the rainy days recently experienced in California. I was skeptical of paying so much for this jacket, but I'm very satisfied with its performance and plan to wear it for many more years. So, I'm sure I'll get my money's worth out of it.

      A climber's coat

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

      I've used this for a couple days of ski touring and a full day of ice climbing so far. Ice climbing is where this coat shines! I get full range of motion and the waist always stays below the harness. I wasn't sure how I'd like not having hand pockets, but it has actually been a good experience. I used to always forget to zip a pocket up and then it would fill with snow. Problem solved! There is plenty of storage in the chest pocket for must have items any ways.

      Great jacket

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

      Quality product from arc'teryx. I bought it for summer climbing, but decided to use it this winter for some snowboarding and snow shoeing. I love the fit, a lot of jackets don't give me full coverage on my arms when they're outstretched (long arms?) this one is perfect. It's form fitting, and seems to change size with my layers. It feels like a perfect fit when I'm wearing a tee shirt, and also feels like a perfect fit when I'm wearing a fleece AND micro puff, some kind of arc'teryx wizardry I guess. As far as weather proofing goes, did phenomenal in a down pour and in 10 hours of snow, kept everything dry. My only criticism, which probably comes from misuse, is that I wish the tabs on the zippers were a little bigger, to make grabbing with gloves a little easier.

      Amazing jacket that can go anywhere

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

      I've worn this jacket skiing in Colorado with a just a fleece underneath, as well as fishing in the cold north Atlantic with a flannel. Extremely light and packs up super small, it keeps all the wind and the rain away.

      The hood is fairly large, I had no problem using it with a ski helmet.

      Amazing jacket that can go anywhere

      Light on weight, heavy on performance

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

      Counting the grams on every piece of gear for your alpine ascent? Worried that pockets for your hands on a jacket are superfluous? Well, then this is the kind of jacket you're looking for. I am a huge fan of Arc'teryx's fit in both their jackets and pants, which I view as much more performance oriented, relative to other brands, like Patagonia (and I am a big Patagonia fan).

      This is not the jacket for endless lift-served skiing, but if you want/need to have a hardshell in your kit for big days in the alpine, this is a great jacket. Perhaps one of the best design features is the hood: it will easily fit over a climbing or skiing helmet, but will also cinch down quite well when not wearing a helmet.

      Full disclosure: when conditions allow I much prefer wearing a softshell, but this is my go to hard shell.

      Photo: top of the Ham n Eggs route on the Mooses Tooth, Alaska Range.

      Light on weight, heavy on performance

      Holds up to a faucet

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

      Held my arm under the faucet, fabric didn't wet out. Claims of breathable yet windproof seem plausible so far. Jacket is very very light, yet doesn't feel fragile.

      I'm 6'-0" with a 39"chest, medium comfortably fits a down jacket underneath but isn't too big for just a t-shirt. I thought I had long arms, but you'd have to be an orangutan to need longer sleeves in this thing.

      No stuff pouch, appears you're supposed to stuff it in the chest pocket. I don't see a tab to clip it to a harness; I think the description should be updated to reflect that no separate stuff sack is included.

      Best Hardshell

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

      This jacket is fantastic! Arc'teryx has a real winner here. My job requires me to be outside daily no matter what the conditions are. The fit is tremendous. The only Hardshell/rain jacket I have owned that is a truly slim fit with long enough arms. The length might be slightly short for some with similar build (I prefer a slimmer fit to length) but perfect for me.

      Great Ultralight Hardshell

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

      It took a lot of convincing for me to shell (no pun intended) out this kind of cash for a hardshell, but after a lot of research I decided to pull the trigger on it. I'm happy to report that it has exceeded my expectations.
      The FL is a no-nonsense hardshell that excels at what it was designed to do: keep you dry without taking up space or adding heft to your pack. The included stuff sack allows you to pack this shell down really small. I was concerned about the lack of pit-zips at first, but the Gore Tex Pro seems to breathe very well without them.
      Speaking of the Gore Tex Pro, this thing is really durable. I've worn it with a heavy pack, and the shoulders haven't shown any wear.
      I got caught backpacking in a windy storm in Texas, and feel like I got to experience everything this jacket has to offer. It blocked the wind, kept me dry from the rain on the outside and the sweat on the inside from hauling a heavy pack.
      I definitely recommend this shell to anyone who wants one of the lightest and toughest jackets in its class.

      Best-in-class Backcountry Hardshell

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

      Bought this jacket after extensive research for a GoreTex Pro jacket that would work equally well for icy East Coast skiing and repeat travel to Europe, Africa, and Asia.

      The Arcteryx fit is great. I'm 6' and an athletic 200 pounds. I wear a size 44 or 46 in a blazer, and the XL in this jacket fits just right through the chest. At the same time, it tapers nicely to an athletic waistline, foregoing the trash bag fit of so many competitors. The sleeves are marginally on the long-ish side, but are designed that way. Coupled with the design of the shoulder, the jacket stays put and the arms stay in place whenever you reach up or out.

      The GoreTex Pro breathes well; I have yet to feel too warm or clammy. The exterior fabric, in turn, achieves a balance between (very) light weight and exceptional durability.

      The jacket's features - the hood and the single chest pocket - are well designed and just as well executed. The hood adjusts easily on the fly, and stays where you want it. Most important, it passes the ultimate test of a hood on a Hardshell jacket: because it does it's job so well, you forget about it. The single chest pocket is bigger than the chest pockets on many other jacket's - bigger by a good bit than the chest pocket on my Arcteryx Stingray jacket I was concerned about the lack of hand pockets at first, but find that the chest pocket is enough and the jacket looks more streamlined without hand pockets.

      As usual, Backcountry's pricing and service was great. Backcountry has become my dealer of choice (or primary enabler, as my wife would put it).

      Great review, Ben, thanks. I'm curious how you layer the Alpha FL with mid-layers...

      I'm about the same weight as you but a few inches taller and usually wear a 42 blazer (occasionally 44). Although I take size Large in Arcteryx, Patagonia, etc., I'm just worried about what I can actually fit under a Large Alpha FL. No expeditions for me (in which case I'd get a different jacket obviously!) just mostly single day pursuits, tele-skiing, ice climbing. Some week-long trips from time-to-time, but nothing polar.
      Any thoughts? Thanks again.

      My last day of skiing for this season, a few weeks ago, offers an answer to your question. The temps for our day-long outing ranged from about 25 up to 40 F. I wore the Alpha FL over an Arcteryx Rho LT top, and a silkweight wool t-shirt. At the start of the day, I also wore a Patagonia Nano-Puff vest, though I opted to drop that as the temps passed 32 F. With that setup, I never felt restricted or constrained, had good freedom of movement, and had excellent temperature control, all while lapping about 25 runs.
      Given your height and measurements, I'd guess you're on the cusp between a L and an XL, and that once you get that dialed in, you'll find it a good setup for the pursuits you mention.

      Hey Ben!
      I'm about your size: 6'2 215 and also wear a roughly 44 blazer. I am leaning towards the XL because Large jackets tend to be a bit tight through my chest and upper arms, but I am worried it will be too baggy around my 34 inch waist, and too long for my 34/35 inch arms. What are your thoughts? I'd love to know your arm length/waist size if possible to compare.

      Unanswered Question

      Not really a question as much as a comment: you list it as packing in its chest pocket and having a loop to clip to harness, which is wrong. Technically you can sort of shove this sucker into it's pocket inside-out, but it doesn't quite fit, the zipper isn't the flippy-kind that works backwards, and there's no loop on the inside.

      That's why it comes with a stuff sack, which does have a loop and can be kept inside it's chest pocket. Not the same. It's much less convenient.

      I seem to be right in the middle of Medium and Large (42" chest; 34" waste; 34/35" sleeves) - recommendation? I'm 6' tall and prefer a slim fit but would like to be able to be mobile (ski) and get a layer or two underneath. Thanks

      Same problem, 42" chest, 32" waist, but only 5'9" (athletic build). I have been using the medium for over a year, but have found it restrictivly tight, particularly under the arms, and also borderline tight in the waist. Have just bought the large, much better fit, more room for layering and room in the chest; the large would be a perfect size for you; you won't be disappointed, a superb jacket.

      I'm hoping someone can give me some advice. I'm 6'4", 195lbs, athletic build, and am having a helluva time finding both a hardshell mountaineering jacket and a good alpine insulated jacket that would likely fit my height. I'm writing here as I know the climbing build of Arc'teryx alphas can be good for taller folks, but I see on here 6'2" people saying the sleeves are just right, or too short. I'm not talking Everest quality cold protection, but for the type of peaks I do, e.g. orizaba, elbrus, cotopaxi, that grade. Any suggestions for brands, specific jackets for my needs? thanks

      I have this jacket in a large. I'm 6'0", 185-190 lbs. It fits great. The arms are long, but not too long. I also have a Beta AR in large. The Alpha FL is a very trim jacket. I usually wear a base layer or light fleece with and insulating layer such as an Atom LT or Nano Air. I would think an XL would give you the required arm length without being too loose in the body.

      I use the Patagonia M10, XL. Used it on Denali. 6'4" 210lbs. I don't associate a shell with cold protection, I just like mine light and functional. Other layers are cold protectors.

      But plus one, curious if this jacket is long enough w/o being baggy like other Arcteryx coats seem to be.

      I'm interested in this jacket or the Norrona Falketind but I'm unsure about the sizing. I find Arcteryx gear in general runs really big for me (5'7" at 150lbs) - in particular the sleeves extend to my knuckles or below. Is the cut on this jacket similar to other Arcteryx gear or is it a bit smaller given the 'fast and light' moniker? Any views on how it would fit compared to the Norrona? BTW, looking at the sizing charts for both brands, I see Arc'teryx small jackets feature a 33" inch sleeve measurement, while the Norrona logs in at 24-24.5". Arc'teryx must have a really strange way to measure sleeve length cos only an Orangutan could have arms that long. Any ideas of the real sleeve length for the Alpha?

      Does anyone have experience skiing in this? I'm just looking for a shell to use for general mountaineering, skiing, and ice climbing. It looks like it would be good for mountaineering and climbing, but sometimes features that make jackets good for those purposes don't translate well into skiing

      Best Answer

      It really depends on how much functionality you want from the jacket when you are skiing. If you are okay with just having one chest pocket and a lighter weight shell this is the one! Its awesome that its really light, the trade off is the durability. There are thicker more durable jackets on the market, they are just way heavier. 10 oz for a Gore Tex Pro Shell 3 layer is pretty dang amazing.

      Bill nailed it. Thanks Bill!

      It's worth pointing out the new version of this jacket is substantially more durable than the previous version, which was constructed with Gore-Tex Active.

      I have the previous version and it's my go-to hardshell for touring. As this is a minimal jacket it features the Trim fit. You will be somewhat restricted in the weight/thickness of mid-layers. I usually throw a synthetic puffy over my Alpha FL if start to freeze when out touring.

      If you're looking for an awesome all around mountaineering/skiing jacket check out the new Alpha AR:

      The Athletic fit block will accommodate a wider range of mid layers.

      There's also the all-mighty Alpha SV:

      I'm 6'2" and pretty much all of Arc'teryx...

      I'm 6'2" and pretty much all of Arc'teryx hardshells (even XL) have sleeves that are too short for me. Could you send me some measurements of this jacket in LARGE to buy it online? (chest, waist, bottom, sleeve, back and front length)

      Best Answer

      Hey rodrigo altamirano,

      Thanks for your question.

      I measured the jacket in a large and came up with these measurements. Across the chest pit to pit: 25?. Across the waist: 23?. Sleeve length from center of back: 37?. Center back length: 31?. Length of the front (zipper): 28.5?.

      When will you get the Black Large Version...

      When will you get the Black Large Version of this jacket again ?

      To the Backcountry Staff- I'd like to...

      To the Backcountry Staff-

      I'd like to challenge you guys to step it up. I, like others on this string of posts, wear an XS in Arc Teryx jackets. People need XS just like people need XL. Backcountry is a leader in the online outdoor retail industry, and arguably you all set the bar for all other online retailers. I'd encourage you to distinguish yourself from other retailers and cater to your customers that need the less common sizes. Despite being produced by Arc Teryx, these jackets are difficult to come by in XS. So if backcountry doesn't stock it, who does??

      Best Answer

      It's possible that they do stock it, but since they're hard to come by, they're frequently out of stock. It's also plausible that Arc'teryx doesn't make as many in that size, limiting Backcountry's ability to keep them in stock. I don't know that that's the case, but it's worth considering.


      hi, I am one of the buyers for Men's Outdoor here at, and have an answer/explanation about our decisions to stock (or not stock) certain sizes. In the case of this particular style Arc'teryx does make it in a size XS, however we typically do not carry them because generally speaking the demand is very low. Sorry we could not accommodate you at this time, but we are always looking for ways to bring our customers the best possible array of merchandise,, and will certainly consider stocking this size in the future.



      I am 6ft 170lbs do you think I should go...

      I am 6ft 170lbs do you think I should go with a medium or a large?

      Hey Kirill or others,

      What size did you end up going with, and how did it work out? I'm in the same boat. I'm 6' 180 lbs. I've checked their sizing chart and according to that I'm in medium range for the chest (41") and large range for the sleeves (36"). Any insight?

      So this question is for anyone that has...

      So this question is for anyone that has used a stuff sack for their hardshell. What happens with the hood? Doesn't this ruin the brim by creasing it?

      Best Answer

      The brim is actually flexible enough not to crease unless you put a lot of pressure on it and really try to fold it. Also, I make it a habit of stuffing/folding the rest of my hardshell into the hood, which makes it easier to stuff into the sack and protects the hood from creasing.

      I ordered the 2013 Alpha SL in Chipotle...

      I ordered the 2013 Alpha SL in Chipotle thinking that it was a red color with a hint of orange. I ended up returning it because it was way more pumpkin orange in color than red. Is the Alpha FL Chipotle the same? The detail picture makes it appear to be more of a red. Also, is the mantis green color more yellow or more lime green?

      To answer my own question, I ordered the FL in Mantis Green & it is an awesome color. It is more green than yellow but still has a yellow glow when in bright sunlight. Overall this jacket has a really good fit and despite being ridiculously light, it feels more durable than I expected. I can't wait to put this bad boy to use.

      Hi, I am also after XS. Will you get XS...


      I am also after XS. Will you get XS soon?


      i called Arcteryx and they said the new...

      i called Arcteryx and they said the new Alpha FL will be produced in an XS. will you be stocking that size in the Carbon Copy color? Thanks.

      Does the new model have reflective tabs...

      Does the new model have reflective tabs like the old one?

      I bought the jacket?love it! But... it does not have the reflective tabs the other one had. The Arc'teryx logo and Gore-tex info is reflective, but the wrists and back do not have the reflective tabs that the old one had. Still an awesome jacket, but those reflectors were so useful! Night skiing, cycling, climbing, hiking...

      I just noticed there are two versions of...

      I just noticed there are two versions of Alpha FL. This one is made of Gore-Tex Pro, and the previous one is made of Gore-Tex Active. Is this one the newer model? Is it better than the Gore-Tex Active version? Thanks.