The essential element.
Putting the proverbial handle on wet weather, wind, and all-around cold temps, the Arc'teryx Men's Proton AR Hooded Insulated Jacket is the one layer you won't want to leave behind the next time you venture into the alpine. Arc'teryx designed the Proton to function as a softshell when wind and light precip catches you hiking down from the summit or belaying three pitches up a route in the alpine. Being the warmest offering in the Proton line, the AR Hoodie is packed full with 90g Coreloft—insulation composed of crimped synthetic fibers that are breathable, compressible, and water-resistant—to deliver dependable warmth in demanding mountain environments. Never one to phone-in fit, Arc'teryx made sure the fit of this jacket promotes mobility and stretch while limiting needless bulk (and weight) when every ounce counts.
- Functions as a softshell and insulator while climbing
- Warmest offering in Arc'teryx's Proton series
- Softshell fabric is breathable and resistant to wind and wear
- Crimped synthetic insulation is compressible and water-resistant
- Nu water-repellent treatment for added protection from weather
- Insulated hood is adjustable and helmet-compatible
- Articulated elbows and gusseted underarms grant mobility
- Trim fit reduces bulk and weight for fast-and-light alpine climbs
- Item #ARC00KS
- Q & A
Pretty good, but needs improvements
- Familiarity: I've used it several times
- Fit: Runs small
- Size Bought: Medium
I just used this out snowboarding for a week in -7C (roughly 19.4 degrees) daytime average with winds anywhere from about 5 - 22 miles per hour. I used it under an Acteryx Sidewinder SV alternating with Arcteryx LTW and Arcteryx Phase AR shirt Baselayers.
I had high hopes for this for use under a gore tex shell snowboarding in very cold conditions. It was mostly on piste with some off piste and chair lifts.
It worked very well at keeping me warm, and breathed very well and not sweaty at all or too hot, on the contrary on the the lifts approaching 1/3 from the top my wrists and forearms felt slightly cool. So it warms up nicely when active, but breaths and lets excess heat and moisture out.
I'd say it's pretty darn good, but with many Arcteryx products I'm always disappointed with the lack of pockets. I talked to one shop staff at Arcteryx who is from the Alps he said we in Europe don't care so much if they save 5 grams of weight, pockets are something you rely on.
The two chest pockets are great (and a surprise), looks like a Norrona copy for the chest pockets, but as a mid-layer specific jacket it needs at least one interior mesh pocket to defog goggles or warm gloves and it also needs a pocket for a music player. Both are a must have. What do you do when you need to defog goggles on mountain, put them under your shell and hope they don't fall out?
Sizing, I'm 5'9", 32" waist, as others have stated the arm pit area is a bit snug and could certainly be opened up. Waist fits just barely and frankly could be looser by an inch or so and could be longer by and inch or so.
I already owned the Acteryx Nuclei AR and I was closely comparing both during my week snowboarding. In very cold conditions I preferred the Nuclei AR hands down over the Proton AR. It's longer, looser, breaths nearly the same and is warmer in very cold conditions, not significantly warmer, but I'd say 10-15% which is just enough, has an interior mesh pocket, and a large helmet compatible hood - I love large hoods, but needs a music device pocket and chest pocket. Even though the Nuclei AR is a larger jacket, it just slides effortlessly under a shell the interior lining I believe is one of my all time favorites of any jacket I own, it's silky soft and slides over any layer.
I gave the Proton AR 3 stars due to the lack of interior pockets and snug fit. Fix these issues and it's a 5 star jacket.
- Familiarity: I've used it several times
- Fit: True to size
- Size Bought: large
Great jacket. Just bought it. It is like a hybrid of an Atom LT, a Patagonia Nano Air, and a softshell. It breathes better than the Atom. I won't go so far as to say it breathes better than the Nano Air, but it is close. It has been a great jacket for 20-30 degree days. The Proton AR also layers easily under a shell (for me a Beta AR and Theta AR). The jacket is great for hiking and great for around town use. It is an athletic fit. So, if you are buff or have a gut, then you may want to buy a size up. I am 200 lbs and muscular, so, the large fits well.
Arc'teryx – Men's Proton AR Hoody
An all-round, versatile hooded jacket created to balance warmth and airflow, the Proton AR Hoody is the warmest option in the Proton series. Designed to perform both as a softshell outer layer and as a mid-layer under a waterproof shell, it leverages advanced material technologies that provide thermal protection while allowing air to pass freely in and out. This helps prevent vapour accumulation and allows the Proton AR to regulate comfort over a wide range of temperatures and conditions.