Extremely durable and breathable, synthetically insulated lightweight hoody for high output activities. *The Proton Hoody was previously the Proton LT Hoody. The Proton Hoody is equipped with a breathable insulation package to manage the dynamic needs of mountain pursuits and perform as a self-regulating mid layer for a variety of high output activities. Breathable insulation means excess heat and moisture can pass through the combination of air permeable fabrics and insulation. In addition to being extremely air permeable, the Fortius Air 20 face fabric has unrivaled hardwearing durability, over 60 times more durable in abrasion tests than the industry standard. Coreloft Compact 80 synthetic insulation in the body maintains excellent stretch recovery. The No Slip Zip keeps the main zipper from self-opening and the helmet compatible insulated hood gives additional warmth. Put it on, leave it on and stay focused on the activity.
Extremely durable and breathable, synthetically insulated lightweight hoody for high output activities. *The Proton Hoody was previously the Proton LT Hoody. The Proton Hoody is equipped with a breathable insulation package to manage the dynamic needs of mountain pursuits and perform as a self-regulating mid layer for a variety of high output activities. Breathable insulation means excess heat and moisture can pass through the combination of air permeable fabrics and insulation. In addition to being extremely air permeable, the Fortius Air 20 face fabric has unrivaled hardwearing durability, over 60 times more durable in abrasion tests than the industry standard. Coreloft Compact 80 synthetic insulation in the body maintains excellent stretch recovery. The No Slip Zip keeps the main zipper from self-opening and the helmet compatible insulated hood gives additional warmth. Put it on, leave it on and stay focused on the activity.
Extremely durable and breathable, synthetically insulated lightweight hoody for high output activities. *The Proton Hoody was previously the Proton LT Hoody. The Proton Hoody is equipped with a breathable insulation package to manage the dynamic needs of mountain pursuits and perform as a self-regulating mid layer for a variety of high output activities. Breathable insulation means excess heat and moisture can pass through the combination of air permeable fabrics and insulation. In addition to being extremely air permeable, the Fortius Air 20 face fabric has unrivaled hardwearing durability, over 60 times more durable in abrasion tests than the industry standard. Coreloft Compact 80 synthetic insulation in the body maintains excellent stretch recovery. The No Slip Zip keeps the main zipper from self-opening and the helmet compatible insulated hood gives additional warmth. Put it on, leave it on and stay focused on the activity.
Extremely durable and breathable, synthetically insulated lightweight hoody for high output activities. *The Proton Hoody was previously the Proton LT Hoody. The Proton Hoody is equipped with a breathable insulation package to manage the dynamic needs of mountain pursuits and perform as a self-regulating mid layer for a variety of high output activities. Breathable insulation means excess heat and moisture can pass through the combination of air permeable fabrics and insulation. In addition to being extremely air permeable, the Fortius Air 20 face fabric has unrivaled hardwearing durability, over 60 times more durable in abrasion tests than the industry standard. Coreloft Compact 80 synthetic insulation in the body maintains excellent stretch recovery. The No Slip Zip keeps the main zipper from self-opening and the helmet compatible insulated hood gives additional warmth. Put it on, leave it on and stay focused on the activity.
Last updated at 11/30/2025 05:02:45
originally posted on arcteryx.com
I have always thought of Arc'teryx as clothing for the name brand. But after recently having the opportunity to grab the proton hoody my entire perspective changed! I think the quality and materials fit exactly the description and activities I get up to. I really like the embroidered touches too. Im 6'8 and got the 2xl which amazes me of how well it fits with arm length vs torso length. The hoody cinch has been the biggest surprise! It actually works and snugs the face well without overhanging into your eyes if you choose not to wear a hat/helmet underneath.Super lightweight, and the breathability vs warmth is surprisingly really good. Been raving about it to a lot of my mates so I am stoked
originally posted on arcteryx.com
My old Proton Lt is my favorite mid layer in winter. It’s comfy, and just warm enough under a parka for blizzards and temps below freezing. With that I was excited to see a warmer version of it with a couple extra features that I always look for.The pocket configuration is perfect: Two chest, two lined hand warmer pockets, and two dump pockets inside (all winter jackets should have these). External chest pockets are way better in winter in my opinion so you are not unzipping to get at stuff. It’s a great spot for a phone. The liner material is very very thin and I’m a tad concerned about that, but time will tell. I also wish that they dropped to 80gsm in the sleeves and hood instead of 60. And as others have noted the sizing has been adjusted to fit a broader range ... MoreMy old Proton Lt is my favorite mid layer in winter. It’s comfy, and just warm enough under a parka for blizzards and temps below freezing. With that I was excited to see a warmer version of it with a couple extra features that I always look for.The pocket configuration is perfect: Two chest, two lined hand warmer pockets, and two dump pockets inside (all winter jackets should have these). External chest pockets are way better in winter in my opinion so you are not unzipping to get at stuff. It’s a great spot for a phone. The liner material is very very thin and I’m a tad concerned about that, but time will tell. I also wish that they dropped to 80gsm in the sleeves and hood instead of 60. And as others have noted the sizing has been adjusted to fit a broader range of body types. It makes business sense but is a bit bulky around the midriff. All in all a good bit of kit that I look forward to grabbing off the rack.
originally posted on arcteryx.com
I received this as a gift from a client of mine, and I am very happy with how it’s lasted me for the past 2 years. It’s survived New England (Massachusetts) weather pretty well, and does great in the snow and rain. I took away one star because I would have liked to have pockets on the inside of the jacket, but the fit is great (5’10”, 180lbs, L). It’s light and keeps me warm. Minus one star since the DWR has basically worn off, and isn’t what it used to be, so it looks soggy when wet. Pairs well with an Arc’teryx gaiter! Especially with the matching color and logo.
I have always thought of Arc'teryx as clothing for the name brand. But after recently having the opportunity to grab the proton hoody my entire perspective changed! I think the quality and materials fit exactly the description and activities I get up to. I really like the embroidered touches too. Im 6'8 and got the 2xl which amazes me of how well it fits with arm length vs torso length. The hoody cinch has been the biggest surprise! It actually works and snugs the face well without overhanging into your eyes if you choose not to wear a hat/helmet underneath.Super lightweight, and the breathability vs warmth is surprisingly really good. Been raving about it to a lot of my mates so I am stoked
My old Proton Lt is my favorite mid layer in winter. It’s comfy, and just warm enough under a parka for blizzards and temps below freezing. With that I was excited to see a warmer version of it with a couple extra features that I always look for.The pocket configuration is perfect: Two chest, two lined hand warmer pockets, and two dump pockets inside (all winter jackets should have these). External chest pockets are way better in winter in my opinion so you are not unzipping to get at stuff. It’s a great spot for a phone. The liner material is very very thin and I’m a tad concerned about that, but time will tell. I also wish that they dropped to 80gsm in the sleeves and hood instead of 60. And as others have noted the sizing has been adjusted to fit a broader range ... MoreMy old Proton Lt is my favorite mid layer in winter. It’s comfy, and just warm enough under a parka for blizzards and temps below freezing. With that I was excited to see a warmer version of it with a couple extra features that I always look for.The pocket configuration is perfect: Two chest, two lined hand warmer pockets, and two dump pockets inside (all winter jackets should have these). External chest pockets are way better in winter in my opinion so you are not unzipping to get at stuff. It’s a great spot for a phone. The liner material is very very thin and I’m a tad concerned about that, but time will tell. I also wish that they dropped to 80gsm in the sleeves and hood instead of 60. And as others have noted the sizing has been adjusted to fit a broader range of body types. It makes business sense but is a bit bulky around the midriff. All in all a good bit of kit that I look forward to grabbing off the rack.
I received this as a gift from a client of mine, and I am very happy with how it’s lasted me for the past 2 years. It’s survived New England (Massachusetts) weather pretty well, and does great in the snow and rain. I took away one star because I would have liked to have pockets on the inside of the jacket, but the fit is great (5’10”, 180lbs, L). It’s light and keeps me warm. Minus one star since the DWR has basically worn off, and isn’t what it used to be, so it looks soggy when wet. Pairs well with an Arc’teryx gaiter! Especially with the matching color and logo.
Arcteryx has completely abandoned its quality control measures. I have over 10 pcs (atom, proton, beta lt, beta ar, atom vest, cerium jacket, fleece sweaters, etc.. and ALL of them are in size M (I'm 5'11, 170lbs). My sister (who lives in the US) bought this for me since she knows I wear size M and sent it over as a present so I can't even return it. This thing fits horrendously, it's like wearing a big garbage bag, the sleeves are unrealistically long and wide, the torso is huge (like a plus-sized jacket) while the neck, hoodie and back length are the same. the old proton used to have a more sleek fit which was easy to layer under the shells but i can't imagine layering this one under any shell comfortably. The old proton fitted like a proper, fitted mid layer but ... MoreArcteryx has completely abandoned its quality control measures. I have over 10 pcs (atom, proton, beta lt, beta ar, atom vest, cerium jacket, fleece sweaters, etc.. and ALL of them are in size M (I'm 5'11, 170lbs). My sister (who lives in the US) bought this for me since she knows I wear size M and sent it over as a present so I can't even return it. This thing fits horrendously, it's like wearing a big garbage bag, the sleeves are unrealistically long and wide, the torso is huge (like a plus-sized jacket) while the neck, hoodie and back length are the same. the old proton used to have a more sleek fit which was easy to layer under the shells but i can't imagine layering this one under any shell comfortably. The old proton fitted like a proper, fitted mid layer but this fits like an oversized parka. I've been reading a lot of reviews about Arcteryx messing up their fits on most jackets and witnessed it firsthand today, will be avoiding their new collections and "revised" fits from now on. it's sad to see such a good brand that I love go down the drain.
Excellent material. I have the Sabre midlayer and regular proton in black. The difference besides the fit and function is of course the horrible chemical smell. I refuse to take the chance to wash it out and lose the ability to return it. My question is: why don’t the Sabre midlayer and proton hoody which are the same material and color have the same awful smell??? Frustrating for sure.Fit of Thai jacket is slightly baggy even for me at 6’ 205 lbs ( give or take) in a size large. I would absolutely keep this jacket for cold weather hiking if not for the odor of the black dye. I will likely return it and try the Eden color instead. Hopefully that one doesn’t stink as badly.
I got this to round out my layering scheme which I put together to go hard and get sweaty in Rocky Mountain winters. I use it to throw over a Proton Lightweight and a baselayer when I've sweat-out my layers skinning uphill. It keeps me warm and breathes enough to allow the layers underneath to dry out. Putting a shell over this really cranks up the heat. Since my use is fairly specific to layering over already pretty substantial layers I went a size UP to keep things roomy and the fit was just what I needed. No... this does not look runway-ready on me by itself. If I were to wear this for the good looks Arc'teryx is known for, I would wear my normal size L and it would probably be more fashionably acceptable. However, this is a technical piece with room for gloves ... MoreI got this to round out my layering scheme which I put together to go hard and get sweaty in Rocky Mountain winters. I use it to throw over a Proton Lightweight and a baselayer when I've sweat-out my layers skinning uphill. It keeps me warm and breathes enough to allow the layers underneath to dry out. Putting a shell over this really cranks up the heat. Since my use is fairly specific to layering over already pretty substantial layers I went a size UP to keep things roomy and the fit was just what I needed. No... this does not look runway-ready on me by itself. If I were to wear this for the good looks Arc'teryx is known for, I would wear my normal size L and it would probably be more fashionably acceptable. However, this is a technical piece with room for gloves and hats in some big ole dump pockets (two) on the inside, two chest pockets for random things you end up stashing/reaching-for in a day in the backcountry, and two hand pockets for even more odds and ends. After stuffing gloves, snacks, random knick-knacks, and detritus into those pockets, you're going to look lumpy; and rightly so. The fabric is so silky and nice inside and out that it's honestly tempting to wear it all the time. The cord adjustments keep out drafts at the hem (using what I consider to be the less handy cord tensioners which aren't the sqeeze-to-release kind) and cinch down the cavernous hood (with a squeeze-to-release tensioner!) with ONE bungee cord instead of two like on the hardshells. The single bungee tightens across the forehead, under the ears, and back around the base of the skull where the tensioner lives; so a single tensioner is actually entirely sufficient and makes for a comfortable result. The zippers are top notch of course. The chest pocket material is a fair bit more burly than the already pretty tough Fortius Air 50 outer fabric (and less silky) and I don't worry about anything inside them poking a hole through it. This is a keeper with, for me, a fairly specific but crucial role in keeping me useful in the mountains all day. Oh, and it's a sight warmer than the Proton LT, which I also own, due to noticeably thicker insulation as well as the hardier face fabric.
This jacket is very light, soft, and comfortable. It does fit a little larger than expected. My past experience with Arcteryx clothing is that they tend to fit a little on the tight side in the torso and shoulders, so I ordered this in XL (I am 6 foot 1 inches, 220lbs). It turns out that Large probably would have worked fine, as this is pretty loose on me. I'm still going to keep the XL because the extra space will be nice for wearing over sweaters. People should be aware that this fits larger than my older Atom LT jacket and vest. Hoody is very breathable (as advertised, but still a surprise). This was great for a hike around freezing, where I did not get sweaty wearing the jacket even when hiking uphill and was able to regulate my temperature well just by removing ... MoreThis jacket is very light, soft, and comfortable. It does fit a little larger than expected. My past experience with Arcteryx clothing is that they tend to fit a little on the tight side in the torso and shoulders, so I ordered this in XL (I am 6 foot 1 inches, 220lbs). It turns out that Large probably would have worked fine, as this is pretty loose on me. I'm still going to keep the XL because the extra space will be nice for wearing over sweaters. People should be aware that this fits larger than my older Atom LT jacket and vest. Hoody is very breathable (as advertised, but still a surprise). This was great for a hike around freezing, where I did not get sweaty wearing the jacket even when hiking uphill and was able to regulate my temperature well just by removing my hat and partially unzipping. The downside is that if you are not exerting yourself and there is strong wind you will get cold in this jacket. It does not block wind, so you will want a shell over it for cold windy conditions.
Great shoulder-season jacket. Used for hiking, bike commute and throwing on when I need a bit more warmth than a hoody. Yes it's expensive but I recently packed it in my carry on for a trip to Europe; it packs down really small, it's very light weight and it was perfect for this time of year (Sept/Oct). It provides minimal water resistance but I got caught in a few rain showers and it held up fine. Overall very happy with it so far. Dropped one star for 'value' rating. If I get more use of it through the winter months then I'll revise it up to 5 stars.
I have owned the proton LT hoody for five years. This is much better. Warmer but still just as breathable. Temps have been in the 30s these mornings and I have yet to put anything but a t shirt on underneath it and have been comfortable on all my endevors. The outer material is more durable than the proton or the atom and is noticably more windproof too thanks in part to the two softshell panel pockets over the chest. Lots of stretch, incredibly comfortable. The zippers art top notch, fleece backed hand pockets are delightful and properly sized. Two huge dump pockets on the inside I love. This refular fit is perfect, generous for a hoody or layer underneat but not as generous as the thoroim or atom, in which I was swimming in the same size. The hood fits over my ... MoreI have owned the proton LT hoody for five years. This is much better. Warmer but still just as breathable. Temps have been in the 30s these mornings and I have yet to put anything but a t shirt on underneath it and have been comfortable on all my endevors. The outer material is more durable than the proton or the atom and is noticably more windproof too thanks in part to the two softshell panel pockets over the chest. Lots of stretch, incredibly comfortable. The zippers art top notch, fleece backed hand pockets are delightful and properly sized. Two huge dump pockets on the inside I love. This refular fit is perfect, generous for a hoody or layer underneat but not as generous as the thoroim or atom, in which I was swimming in the same size. The hood fits over my helmet and hugs my head without impeading hearing. When cinched down without a helmet it feels as comffortable as a warm beanie and the collar is the perfect size. The cuffs are not adjustable but are stretchy enough to pull up just below my elbow. The arcteryx logo and wording on the hood have a little black in them and are just subtle enough and make the hoody look stunning. Soft, stretchy, breathable and warm, this is the most comfortable and versatile jacket I have ever worn and it will be used every day this winter.
Most comfortable daily wear jacket I have. It's soft, warm, and breathable. I bought it to wear under a shell for skiing, but have not had a chance to use it for that use case. In the meantime, I wear it almost everyday, when I expected to just keep it in my closet until ski season.The fit isn't as flattering as my other Arcteryx stuff. Not sure if it's because of the puffiness, but I wear it a lot in spite of that. I do wish they made a non-hoody version. I tried the Atom, but the Proton is superior in terms of insulation and feel.
