Proton LT Hooded Insulated Jacket
While carrying a jacket for every kind of weather you might encounter may appeal to your inner gear geek, it's a whole lot easier to carry one layer that will handle just about any inclement weather you face on your adventures. The Arc'teryx Proton LT Hooded Insulated Jacket puts versatility at the top of its strengths with a breathable and weather-resistant face fabric and synthetic insulation. Arc'teryx's Fortius Air 40 fabric is air permeable to prevent overheating while you're on the move, but resistant to wind, water, and snow when clouds gather over your objective. Coreloft insulation adds lightweight warmth that is quick to dry, whether it gets wet with sweat or snow. Arc'teryx gave the Proton a climbing-specific design with a trim fit to reduce needless bulk, articulated arms and gusseted elbows for climbing mobility, and an insulated hood that is helmet compatible.
- Durable, breathable, and warm hoodie for high output adventures
- Weather-resistant, durable fabric protects against the elements
- Air permeable insulation regulates a comfortable micro climate
- Insulated helmet compatible hood offers added warmth in cold temps
- No Slip Zip prevents main zipper from self-opening during activity
- Insulated handwarmer pockets warm cold hands during rest breaks
- Dual hem adjustments help to seal out gusts in adverse conditions
- Slim fit allows freedom of movement and comfortable layering
- Item #ARC00YV
What do you think about this product?
January 19, 2020
Killer Alpine Mid Layer
Let's talk about what the use-case is for this jacket. This thing is designed for high-exertion activities in cold weather. This means that it has some air permeability, also referred to as being "breathable". The Proton is not completely windproof, but it is designed this way on purpose. When you are working hard up the mountain, you don't want to completely seal out all air as you will become a hot and sweaty mess. Obviously being an insulating piece, you still want to retain some of that body heat when you're placing pro or stuck behind a slow group on the mountain. The Proton does a pretty magical job or balancing both better than anything else I've found. I've gone through several different options for mid-layers. Started with a few different fleece variants, with my favorite being the Arc'teryx Kyanite. It's Powerstretch Pro fabric is nice and breathable while retaining a good amount of heat. The problem with fleece is that it is not a great stand-alone jacket as an outer layer unless it is "windproof" and then it is too stiff, heavy, and hot. Next I went with the venerable Arc-teryx Atom LT. While it is an exceptional jacket that earns its accolades, I've found it WAY too warm for uphill activities (and most downhill activities quite honestly.) Thus, we come to the Proton LT. It just has the exceptional ability to be just warm enough on a cold and windy base camp to not feel shivering cold, but lets enough air in to keep from overheating on an off-season summit bid of a Cascade volcano. For mountaineers, this piece just fills so many gaps in your jacket quiver. Obviously you're still going to have a down puffy for extreme cold and a hard shell for serious precip, but the Proton works for just about everything else. Fit wise, this thing is perfect for me. I am a long and lanky 6 foot 2 inches and about 175 pounds. I find myself always wishing for another inch or so on Arc'teryx jacket sleeves, but not the Proton! It's solidly to my wrist and stays there even with small reaches. It is also a bit less of a slim fit as my Atom LT. Has the longer tail on it and slightly more roomy. It's soft and comfy like the Atom, but seemingly much more durable with a heavier face fabric. I like the hood. Nicely adjustable and works well with or without a helmet on. So... yeah. It rocks. Don't hesitate if you're looking for a mountaineering or cold weather mid layer. I doubt you'll find better.
December 30, 2019
Good for everything
Warm, comfortable, and durable. I've used this jacket as an outer layer while climbing, and a mid layer for skiing. The outer material is impossibly light and breathable, while still retaining warmth. I highly recommend this!
December 5, 2019
Warm and Versatile
This jacket is great! I was able to demo one for a week but it only took me about 2 hours to decide I wanted one. It is as versatile as the Atom LT, but with a more durable exterior and seems to be a bit warmer. Great for wearing casually around town, or hiking, skiing, etc.
October 30, 2019
Great product if you use it right.
I think that a lot of people are looking for a unicorn jacket. One jacket that can conquer all situations. Those jackets are so hard to find because they usually are mediocre in all categories. Instead of stellar in a few. This jacket isn't a unicorn, it isn't going to be the only jacket you will ever need. But it will help fill a lot of gaps in your quiver of jackets. The purpose of this jacket is to provide warmth while stationary, and breathability while doing highly aerobic exercises. It will shed light rain and snow but it isn't going to be your outer layer while in a blizzard. The cut of this jacket is slim, which works great for layering. The hood is nice and big. The front of the jacket is short, which is similar to other Arc'teryx jackets. I would compare this jacket to the Arc'teryx Atom LT or the Patagonia Nano Air. The biggest difference is that the Proton LT is more durable, with a different face fabric and is much more breathable. Please contact us if you have any questions!
October 29, 2019
Cold weather hiking, no problem!
October 29, 2019
While going uphill you need something breathable, the Proton LT is much more breathable than the Atom LT with a lot of the same great features.
October 29, 2019
Perfect for cold weather trail running!
October 8, 2019
King of the Alpine Fall
I love this thing! This jacket has been with me on every early morning dog walk from mid-September until now and beyond. Sometimes, it is 45F and crisp, or 60F and steamy, but this jacket is super breathable and versatile. I have used it for a football game, for hiking in the Wasatch, for running in the middle of the night with the dog, and for every other activity in between. I love how comfortable it is on my chin (beard stubble can make some jackets miserable). The pockets are ample, but not overly bulky. The DWR/weather resistance worked great during some decent drizzles on my walks. The jacket is awesome for Fall ( and likely spring). They nailed it here!
October 1, 2019
Slick mid layer
Really love the proton. Took it out on the river this weekend while fly fishing in Montana and it was awesome. Perfect for the cool September air for hiking in Yellowstone and fishing the Madison. Cant wait to try it out this winter skiing in the Wasatch.
January 28, 2020
what size did you go with?
September 9, 2019
Swiss Army knife
I’ve had mine for 2 years. Looks terrific (still). I’m a medium in all clothing from every brand and wear this in a medium. It’s wind resistant:breathable enough to do it all. Warm enough for standing around in down to 35 F or high output activity to 0 F. I use it for fall hiking, late early season rock climbing, very cold XC skiing, as a mid layer for skiing, an outer layer for ice climbing, and around the city in cold fall or warm winter weather. Despite my best effort, no rips, snags, scuffs, pulls, or pulling. Not water proof but good enough for light precipitation. Super durable. Compares to similar breathable insulated mid-layers and for me, this is the best due to fit, style, function, and durability. Don’t often write reviews but when my Proton wears out in 5 or so more years, I’d like the Proton to have been popular enough that Arc’teryx is still producing it!
July 29, 2019
The Ultimate Mountain Jacket
The Proton LT Jacket is a highly breathable, packable, insulated mid-layer that's meant to do virtually any activity from skiing to climbing. It warm enough to be a stand-alone jacket with 80 grams of Coreloft insulation on the inside but has a shell made of breathable and Fortius Air that allows air to pass in and out but also prevents vapor accumulation/sweat build up, making it a perfect insulating layer, as well. The zipper has been updated this year to a "No Slip Zip" so it stays tight in place. I'd describe the Proton LT as a more packable and warmer yet more breathable version of the cult-classic Atom LT.
July 26, 2019
the king of alpine insulation
with 80 grams of coreloft it keeps you plenty warm, but sheds heat with the exterior fortius face fabric. Weighs nearly nothing, and has an awesome slim fit with a long center back length to make it more harness compatible. awesome piece for touring, climbin, or hiking!
November 6, 2019
Is this the lastest & newest version of the Arc'teryx Proton LT? I heard Arc'teryx revised this jacket and wanted to know if this is the revised version?? Thank you!
October 8, 2019
How does this jacket do in the rain?