• 4 4 5.5 4ZM3.5 4C3.22386 4 3 3.77614 3 3.5C3 3.22386 3.22386 3 3.5 3C3.77614 3 4 3.22386 4 3.5C4 3.77614 3.77614 4 3.5 4ZM1.5 4C1.22386 4 1 3.77614 1 3.5C1 3.22386 1.22386 3 1.5 3C1.77614 3 2 3.22386 2 3.5C2 3.77614 1.77614 4 1.5 4ZM2.5 5C2.22386 5 2 4.77614 2 4.5C2 4.22386 2.22386 4 2.5 4C2.77614 4 3 4.22386 3 4.5C3 4.77614 2.77614 5 2.5 5ZM4.5 5C4.22386 5 4 4.77614 4 4.5C4 4.22386 4.22386 4 4.5 4C4.77614 4 5 4.22386 5 4.5C5 4.77614 4.77614 5 4.5 5ZM6.5 5C6.22386 5 6 4.77614 6 4.5C6 4.22386 6.22386 4 6.5 4C6.77614 4 7 4.22386 7 4.5C7 4.77614 6.77614 5 6.5 5ZM7.5 6C7.22386 6 7 5.77614 7 5.5C7 5.22386 7.22386 5 7.5 5C7.77614 5 8 5.22386 8 5.5C8 5.77614 7.77614 6 7.5 6ZM5.5 6C5.22386 6 5 5.77614 5 5.5C5 5.22386 5.22386 5 5.5 5C5.77614 5 6 5.22386 6 5.5C6 5.77614 5.77614 6 5.5 6ZM3.5 6C3.22386 6 3 5.77614 3 5.5C3 5.22386 3.22386 5 3.5 5C3.77614 5 4 5.22386 4 5.5C4 5.77614 3.77614 6 3.5 6ZM1.5 6C1.22386 6 1 5.77614 1 5.5C1 5.22386 1.22386 5 1.5 5C1.77614 5 2 5.22386 2 5.5C2 5.77614 1.77614 6 1.5 6Z"

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  • 4 4 5.5 4ZM3.5 4C3.22386 4 3 3.77614 3 3.5C3 3.22386 3.22386 3 3.5 3C3.77614 3 4 3.22386 4 3.5C4 3.77614 3.77614 4 3.5 4ZM1.5 4C1.22386 4 1 3.77614 1 3.5C1 3.22386 1.22386 3 1.5 3C1.77614 3 2 3.22386 2 3.5C2 3.77614 1.77614 4 1.5 4ZM2.5 5C2.22386 5 2 4.77614 2 4.5C2 4.22386 2.22386 4 2.5 4C2.77614 4 3 4.22386 3 4.5C3 4.77614 2.77614 5 2.5 5ZM4.5 5C4.22386 5 4 4.77614 4 4.5C4 4.22386 4.22386 4 4.5 4C4.77614 4 5 4.22386 5 4.5C5 4.77614 4.77614 5 4.5 5ZM6.5 5C6.22386 5 6 4.77614 6 4.5C6 4.22386 6.22386 4 6.5 4C6.77614 4 7 4.22386 7 4.5C7 4.77614 6.77614 5 6.5 5ZM7.5 6C7.22386 6 7 5.77614 7 5.5C7 5.22386 7.22386 5 7.5 5C7.77614 5 8 5.22386 8 5.5C8 5.77614 7.77614 6 7.5 6ZM5.5 6C5.22386 6 5 5.77614 5 5.5C5 5.22386 5.22386 5 5.5 5C5.77614 5 6 5.22386 6 5.5C6 5.77614 5.77614 6 5.5 6ZM3.5 6C3.22386 6 3 5.77614 3 5.5C3 5.22386 3.22386 5 3.5 5C3.77614 5 4 5.22386 4 5.5C4 5.77614 3.77614 6 3.5 6ZM1.5 6C1.22386 6 1 5.77614 1 5.5C1 5.22386 1.22386 5 1.5 5C1.77614 5 2 5.22386 2 5.5C2 5.77614 1.77614 6 1.5 6Z"

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  • 4 4 5.5 4ZM3.5 4C3.22386 4 3 3.77614 3 3.5C3 3.22386 3.22386 3 3.5 3C3.77614 3 4 3.22386 4 3.5C4 3.77614 3.77614 4 3.5 4ZM1.5 4C1.22386 4 1 3.77614 1 3.5C1 3.22386 1.22386 3 1.5 3C1.77614 3 2 3.22386 2 3.5C2 3.77614 1.77614 4 1.5 4ZM2.5 5C2.22386 5 2 4.77614 2 4.5C2 4.22386 2.22386 4 2.5 4C2.77614 4 3 4.22386 3 4.5C3 4.77614 2.77614 5 2.5 5ZM4.5 5C4.22386 5 4 4.77614 4 4.5C4 4.22386 4.22386 4 4.5 4C4.77614 4 5 4.22386 5 4.5C5 4.77614 4.77614 5 4.5 5ZM6.5 5C6.22386 5 6 4.77614 6 4.5C6 4.22386 6.22386 4 6.5 4C6.77614 4 7 4.22386 7 4.5C7 4.77614 6.77614 5 6.5 5ZM7.5 6C7.22386 6 7 5.77614 7 5.5C7 5.22386 7.22386 5 7.5 5C7.77614 5 8 5.22386 8 5.5C8 5.77614 7.77614 6 7.5 6ZM5.5 6C5.22386 6 5 5.77614 5 5.5C5 5.22386 5.22386 5 5.5 5C5.77614 5 6 5.22386 6 5.5C6 5.77614 5.77614 6 5.5 6ZM3.5 6C3.22386 6 3 5.77614 3 5.5C3 5.22386 3.22386 5 3.5 5C3.77614 5 4 5.22386 4 5.5C4 5.77614 3.77614 6 3.5 6ZM1.5 6C1.22386 6 1 5.77614 1 5.5C1 5.22386 1.22386 5 1.5 5C1.77614 5 2 5.22386 2 5.5C2 5.77614 1.77614 6 1.5 6Z"

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Proton Hoody Men's
$350.00

Proton Hoody Men's

Fair Trade Certified

Rating Distribution

Select a row below to filter reviews.
25 reviews with 5 stars.
5 reviews with 4 stars.
4 reviews with 3 stars.
5 reviews with 2 stars.
3 reviews with 1 star.

Overall Rating

4.0
25 out of 30 (83%) reviewers recommend this product

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Rating Summary

warmth
fit
satisfaction
wearing
small
purchase
comfort
size
1 to 8 of 42 Reviews
1 – 8 of 42 Reviews
Age:25-34
Gender:Male
Your Height:191cm - 197cm
2 out of 5 stars.

Sizing completely wrong

2 days ago
I'm 6'3 210 lbs and the XL is to big for me, the new skirt hits the middle of my hamstring, the slim fit looks more like a loose/baggy fit. I was hoping to wear this jacket while touring, but the dimensions don't give me confidence for my days in the mountains. I tried on the L in store and it was extremely tight, so I figure it out the XL will fit me right like all my arcteryx jacket that I own (thorium, sabre, beta ar, atom sl, squamish). I don't understand, there seems to be a size missing between the L and XL. I wish I kept my old Proton, it seemed more robust and suitable for mountain outings. Cannot return it, I give it a chance out there, but didn't pass the test.
Q: Size Purchased:
A: XL
I use this product for:Climbing, Hiking, Ski/Snowboard

No, I do not recommend this product.

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Northern BC
Age:25-34
Gender:Male
Your Height:176cm - 182cm
5 out of 5 stars.

Another tool in the tool box

5 days ago
I mean it’s an Arc’teryx jacket, they fit great, supper comfortable, well wearing and protective. This is one of many in my arsenal of Arc’teryx gear. I also have the atom LT and this one is heavier with a lower back than the atom.
Q: Size Purchased:
A: Medium
Q: Pros:
A: Fitted, comfortable.
Q: Cons:
A: Zipperpulls are thin
I use this product for:Commuting/Travel, Trekking, Climbing, Mountaineering, Casual Wear, Hiking, Ski/Snowboard

Yes, I recommend this product.

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Bozeman
Age:35-44
Gender:Male
5 out of 5 stars.

The workhorse

15 days ago
It's a rare day when a proton doesn't make its way into my backpack. Breathable enough to skin in on a cold day, warm enough to use as a belay jacket, and burly enough to climb in if you need to! And even with all that abuse it still lasts for years.
I use this product for:Trekking, Climbing, Mountaineering, Casual Wear, Hiking, Ski/Snowboard
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Age:35-44
Gender:Male
Your Height:168cm - 175cm
3 out of 5 stars.

You win some, you lose some.

22 days ago
For those who are new to breathable insulation, this will feel like a Godsend. For those who are spoiled by the old Proton LT/FL, this will be a mixed bag. I've used the proton since 2015 (LT with 40D Fortius fabric) and every year it has gotten better until this year. It's not all bad, the looser fit put me solidly in size medium, I was in between size before. The longer fit is better for skiing in the spring since it helps keep the snow out. That's about where it ended. I've only had this latest revision for 2-3 months and I am avoiding it in favor of my old proton. The long hem at the back goes almost past my buttock which is even further than some of my waterproof shell. Combine that with how it wet out much easier now that I will occasionally hang this jacket to dry in the sun. The front hem is also longer and notice it bunchs up way more than the old version when I kneel. I was kind of disappointed to see that during the spring of 2025, they didn't have a new revision to correct some of these issues, so I thought I would write a review.
Q: Size Purchased:
A: M
Q: Pros:
A: Breathable, comfortable fit
Q: Cons:
A: Worse than last version
I use this product for:Trekking, Trail/Running, Climbing, Mountaineering, Casual Wear, Hiking, Ski/Snowboard

Yes, I recommend this product.

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Response from Arc'teryx:
18 days ago
Arc'teryx Guest Services
Hi Thanh. Thank you for sharing your experience with the latest Proton Hoody. We appreciate your long-standing support and detailed insights into how the revisions compare to previous versions. While we’re glad the updated fit has worked well for you in terms of sizing and coverage for skiing, we understand that the longer hem and changes in water resistance may not align with your expectations. Feedback like yours is invaluable as we continue refining our designs, and we’ll be sure to share your input with our product team.
0 Comments
Age:45-54
Gender:Male
Your Height:176cm - 182cm
3 out of 5 stars.

Breathable & warm, but worried about durability

a month ago
Bought this for use as a mid-layer at the end of Jan this year. Loving the fit and breathability of the jacket. Keeps me warm under a GoreTex shell even in -20C, but doesn’t get too hot when things warm up. I’m quite disappointed however, that I’ve had this for one month and the jacket is already showing signs of wear and the material is pilling under the armpits. I’m using it for resort skiing and as a light jacket around town, and not using a backpack. Kind of blown away that a jacket at this price point is showing this kind of wear with a month of light use.
Q: Size Purchased:
A: Large
Q: Pros:
A: Warmth, breathability, fit
Q: Cons:
A: Pilling with 1 month light use
I use this product for:Casual Wear, Ski/Snowboard
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Response from Arc'teryx:
a month ago
Arc'teryx Guest Services
Hi there, thanks for sharing your feedback on the Proton Hoody. We're glad to hear you’re enjoying the fit and breathability of the jacket, but we’re sorry to hear about the early signs of wear. We appreciate you bringing this to our attention, and we’ll be sure to pass your comments along to our team.
0 Comments
Pennsylvania
Age:45-54
Gender:Male
Your Height:191cm - 197cm
5 out of 5 stars.

Breathable enough for a wide range of temps

2 months ago
Absolutely love this jacket. I basically live in it from October - March so I'm buying two more so I can rotate the stock and get them in the wash periodically. It looks great and breathes so well that I can leave it on as I move throughout my day. Love the long, trim cut and long sleeves.
Q: Size Purchased:
A: L
Q: Pros:
A: Breathability, cut, fit
Q: Cons:
A: Sometimes the cuffs get bunched
I use this product for:Commuting/Travel, Trekking, Mountain Biking, Casual Wear, Hiking

Yes, I recommend this product.

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0 Comments
Idaho
Age:45-54
Gender:Male
Your Height:176cm - 182cm
1 out of 5 stars.

Disappointed - Sizing Change ?

2 months ago
Did the sizing change ? Seems to be really long in the Torso, compared to all my other Arcteryx coats. Bummer, Arcteryx was my consistant go to for fit, but lately i've had to return all the newer models that i've ordered.
Q: Size Purchased:
A: XL
Q: Pros:
A: SEEMS WELL MADE LIKE PAST MODELS
Q: Cons:
A: SLOPPY FIT AND TOO LONG NOW
I use this product for:Commuting/Travel, Casual Wear, Hiking

No, I do not recommend this product.

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Response from Arc'teryx:
2 months ago
Customer Service
Hello there, thank you for your feedback! The Proton Hoody’s fit has been updated with a revised fit and sizing. While the Medium size remains unchanged, smaller sizes are now a bit tighter and larger sizes looser, which might explain the longer torso you’ve noticed. We understand how frustrating it can be when a trusted fit changes, and we’re sorry to hear this has impacted your experience. Your input is valuable, and we’ll share it with our team. If you’d like help finding an alternative that works better for you, feel free to reach out!
0 Comments
Edmonton, AB
Age:35-44
Gender:Male
Your Height:168cm - 175cm
5 out of 5 stars.

Perfect for those Mild Winters

2 months ago
I've been using this as an outer layer when I'm getting out of the car and getting ready for the skin up. It's warm enough as I'm pulling the boots on, slappin the skins to the skis and packing the backpack. If the approach is not too strenous, it's a great outer layer. Awesome mid-layer for them ice climbs. non-bulky insulation when moving on the ice. Although it is fitted, I don't have any issues with movement when swinging my tools. As a belayer, you'd prob want something warmer but that's what belay jackets are for eh! Also a great layer post-run to keep warm but not overheat when you're cooling down. Super versatile, stylish and just outright sweet on those mild winter days. I'm 173cm, medium build. Small fits with a baselayer but wouldn't stash anything else underneath. Can bunch above the harness if your waists are a bit on the wider side.
Q: Size Purchased:
A: S
Q: Pros:
A: Non bulky insulation
Q: Cons:
A: Trim Fit
I use this product for:Climbing, Casual Wear, Ski/Snowboard

Yes, I recommend this product.

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0 Comments
1 – 8 of 42 Reviews
Proton Hoody
rating 4.0476 out of 542 Reviews

Breathable warmth for climbing and high-output mountain activities.

$350.00
Colour:Stratus
Size:
Sizing chart & Fit guide
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Proton Hoody Men's

Made for climbers – but not limited to rock and ice – the Proton Hoody is the go-to breathable insulation layer for high-output mountain missions. 80gsm Coreloft™ Compact insulation works with the air-permeable face fabric and liner to regulate temperature and vapour build-up. The Fortius Air 20 nylon shell is light and durable, articulated patterning removes restriction, and a helmet-compatible insulated hood extends the warmth.

What's been updated: Updated with a PFAS-free DWR (Durable Water Repellent) treatment, Fortius™ Air 20 face fabric with 42% recycled nylon, and Coreloft™ Compact insulation for improved stretch and breathability.

Proton

Air permeable mid layer insulation with abrasion and weather resistant outer surface.

Synthetic insulation

Man-made insulation with quick dry times, durability and retains warmth when damp.

Fair Trade Certified™

Produced in a Fair Trade Certified facility. Building worker well-being into our product DNA.

Multi-use

Versatile high performance designs for diverse activities and conditions.