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Alpine climbing never felt so good.

Let the lightweight Arc'teryx Men's Alpha LT Jacket protect you from wet weather on your alpine ascent. Using an ever-reliable Gore-Tex Pro membrane and WaterTight external zippers, this jacket boasts guaranteed waterproof and breathable protection to get you up that mountain comfortably. Arc'teryx improved its StormHood to fit climbing helmets better, and the HemLock system features removable inserts to prevent the jacket from slipping out underneath your harness.

Arc'teryx's athletic fit uses complex e3D patterns with anatomical shaping and gussets to reduce bulk and improve your mobility on the mountain. Zip down the underarm vents while you climb to let out some steam, and zip them back up while you belay your buddy on those cold ledges. The cuffs have laminated hook-and-loop tabs that won't catch or tear off during your ascent.

  • 3-layer Gore-Tex Pro membrane, fully taped seams
  • Athletic fit with e3D, hip length
  • Gusseted underarms
  • Underarm zippers
  • Helmet-compatible StormHood
  • WaterTight external zippers
  • Hem drawcord with HemLock removable inserts
  • Laminated hood-and-loop tabs

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Review Summary
3 4
1 3
1 2
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Arc'teryx Alpha LT Jacket - Men's

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Here's what others have to say...

3 5

I don't think this was worth the price

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

The fit is a bit strange, very baggy and short, but may work for you depending on your build and preferences. The seam glue will deteriorate and come apart over time.

I am 6 ft tall, weight 170 lbs and...

Posted on

I am 6 ft tall, weight 170 lbs and have a 42 in chest. I have tried the ALpha FL and the M was a bit too snug (it would be hard to layer under) and the L definitely too large for my stomach. Do you think a Alpha LT in M will fit me?

Responded on

Hey Matt,

This LT version is an expedition fit and let out a little more rather than the trim fit of the FL. If the Medium of the FL fit but just didn't have enough room for layering then going with the Medium on this jacket would probably work perfectly for you.

Responded on


Alpha LT with Patagonia Micro Puff

Alpha LT with Patagonia Micro Puff

Posted on

Photo for sizing. M Alpha LT with S Patagonia Micro Puff. Hood on this thing is huge!

5 5


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

Bought this as my new splitboarding and mountaineering shell. Went one size up from my normal (small), to fit over a bunch of layers. For use without layers it will be a little loose, but not too bad. Right after I purchased this I got sick so I haven't had a chance to test it in the field but I thought I would throw a photo up to show fit. Weight and construction on this garment is insane! Arcteryx is worth the price tag for sure. Easily the nicest piece of gear I own in terms of quality. The stitching and taping of this product is the best i've seen. In the picture I have a Patagonia micro puff hoodie on size small. The medium shell fits well without compressing the insulation, and I could easily wear both hoods and a helmet on a cold belay ledge. Nice dropped length in back. Stoked!

5 5

Worth It

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

I bought this along with the Gamma MX soft shell and am extremely impressed. Not only was this the lightest hardshell I've ever owned but it fits like a glove over the Gamma and is rugged enough not to worry about it when scrambling over rough Wasatch granite. It comes packed with all the features any die hard alpinist would want yet maintains a nice, sleek package any minimalist can appreciate. I was a little unsure of the fit when I first ordered it but was thoroughly satisfied once I put it on. The extra gussets allow the jacket to maintain hip level while raising both arms fully extended which makes this bad boy all that much nicer on long ice climbs. This was my first Arcteryx jacket and it definitely won't be my last! Def worth the price you pay for it! I'd highly recommend this for any serious alpine climber, mountaineer, ice climber, or any outdoors enthusiast for that matter!!!

4 5

Winter Armour For Serious Mountain Ops

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

When you first take a look at it, you wonder why a jacket so lightweight costs $$$. Then you put it on and you appreciate the athletic fit, the durable construction, the micro seams with micro taping, and the waterproof zippers. Then you wear it during a snowmaggedon event and it all makes sense. The 40D Nylon and Gore-Tex Pro 3L material works like magic. Its deceptively light, but impressively durable, totally waterproof, and still allows your body to breath during high output activity. Unparralleled quality of construction. As a technical shell, the expedition fit has a waistline that is lower at the back than at the front, for compatibility with a harness. That might look goofy for the casual wearer. It also doesn't have hand pockets because you can't use them in a harness anyway. When fully zipped the jacket has a high collar, also an expedition feature. Again, might look goofy. Or you might look like a rugged an of action. That is on you. The hood is adjustable and happiest when you're wearing a climbing helmet. The chest pockets are a good size. Sleeves are a little long so they don't slide up when swinging an axe or placing a cam. Gents, keep in mind that this is purpose built expedition wear. Highly packable, there is no excuse not to bring this with you no matter the time of year. In winter, wear it over layers as a technical shell. In spring/fall wear it over long sleeves to block wind and rain. In summer, wear it over t-shirt for waterproof comfort. However, if price is a major concern there are other jackets with similar features for less $$. 4 stars only for price.

Responded on

I enjoyed your review. You mentioned other jackets with similar features, do you care to list a few real quick? I would appreciate some help in where to look for a quality waterproof jacket

5 5


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

I wanted a lightweight rainshell that didn't feel like it was so thin that it would tear if it snagged on a branch. This thing is super light, but it feels like a suit of armor. I love it.

Unanswered Question

Anyone try out the new Alpha with the new...

Posted on

Anyone try out the new Alpha with the new goretex pro material?