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Cotton can turn a cold, wet winter day into absolute misery, but the supremely-warm fleece of the Marmot Men's Reactor Hooded Fleece Jacket won't skip a beat in those same conditions. Worn alone, this jacket has all the features you need to stay comfortable and prepared in cold weather, and when truly brutal cold moves in, wear the Reactor under your shell jacket as an insulator.

  • Polartec Classic 100 Micro fabric has a high weight-to-warmth ratio to fight off the cold, and it dries quickly
  • Angel-Wing Movement cut gives you ample range of motion in the arms
  • Flat Lock Construction eliminates bulging seams that cause annoying chaffing
  • Wind flap behind front zipper and chin guard keep your face warm in bitterly cold conditions
  • Elastic drawcord hem cinches things up at the waist to lock out chilly drafts

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Here's what others have to say...


Lightweight and comfy

  • Familiarity:I've put it through the wringer
  • Fit:True to size
  • Height: 5'09"
    Weight: 168 lbs
    Size Purchased: Medium

Lightweight fleece, nicely cut hood that doesn't drape over your eyes.


Super versatile

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

Love this jacket and it has become a daily wear due to its versatility and comfort. Also great as a base layer for skiing.


Given as a Christmas Gift

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

Purchased for my dad. He's been looking for a hoody which could fit under a coat and this fit the bill. He's been liking it so far; he finds it well-made, warm, and very comfortable. I suspect he cold washes it then puts it to hang dry like he does with most clothes he owns. This is an everyday jacket for him. Highly recommended.


Purchased as Christmas Gift

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

My husband loves this hoody/jacket. He wears it almost everyday (gym, errands, trail walks/hikes). I bought it in cobalt blue. It's well-made, warm, comfy, and has survived a number of washes (cold wash/hang dry) but still looks good. I'm thinking of getting him another one as a back-up ;). My husband is 6ft 2in ~200lbs. and he wears XL.

Unanswered Question

Im 6'5" 260 pounds. I bought a Marmot rain...

Im 6'5" 260 pounds. I bought a Marmot rain jacket in a Xl and it fits kinda tight. What size should I get in this jacket?


Made a great gift

  • Fit:Runs large

I gave this to my father-in-law for his birthday. Fit is on the large side, he's 5'4" 135 lbs and the small was a little roomy for him. However, he says it super comfy and will help keep him warm in Minnesota this winter.


Very good fleece jacket

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

Very good fleece jacket. Comfortable, soft and pleasant to the touch.

six foot 240 pound linebacker type build....

six foot 240 pound linebacker type build. What size should I wear?

You'll be good with the XL, depending on how tight or loose you prefer. I also recommend checking out the size chart. It's a good indicator of what to expect. Best of luck!

Im 5'8 140lbs what size?

Im 5'8 140lbs what size?

You're right in between the small and the medium. I would probably go with the small based on your weight. The jacket may be just a touch short depending on what you're used to.


Great product

  • Gender:Male

This was my first Marmot purchase and I couldn't be happier. Light weight, super soft, and like the description says, warmth to weight ratio is wonderful. I'm 6'3, 160 and got the Large. I have monkey arms and this fits great. Loose fit enables me to wear a sweater underneath for apres ski and I'm toasty to temps around 20. Would recommend it to anyone.


simple and versatile

  • Gender:Male
  • Familiarity:I've used it several times

This fleece has turned out to be great. I bought it as a backpacking warm layer because of the lightweight and the hood. Even in summer I sometimes find myself wishing I'd brought a warm hat on cool evenings in the mountains. It packs small for it's size, it breathes really well and does a decent job of keeping wind out, as long as you are facing into it, panels only in the front. Reviewer saying it is only as warm as a flannel shirt may not have ever relied on a flannel shirt to keep warm. The warmth to weight ratio is great here. The hood fits close and warms the face and throat without impeding visibility or bothering my chin.The top of the zipper, when open does poke up at a funny angle but is really not a problem.With a light shell over it, it is really warm and comfortable.I have worn it down to about -4c and found it to be warm enough while moving but you would need a shell or more layers below that. Because it works so well and is so comfortable it has become an everday garment, worn to my daughter's soccer games and practices and whatever hiking I can fit in. It fits on the large side for sure. I'm 5'9" 165lbs and got a medium based on the Marmot size chart. I would fit into a small I'm sure but the extra room is not uncomfortable. Better on the big side than the small. Being a Canadian customer I got burned on duty, taxes and had to pay shipping so beware if you haven't purchased anything in a while, some of the policies have changed. Service was great, shipping was fast.


CK Funderburgh

  • Gender:Male
  • Familiarity:I've used it several times

Love this Jacket and the fact that it comes in Hokie colors only makes it that much better! I have worn this on 28 degree morning and 60 degree days and it has been great in both conditions!


great as a layer, so-so as a jacket

  • Gender:Male
  • Familiarity:I've used it several times

It's very comfortable, and very soft, as others have noted. It fits well, and is nice looking as a standalone garment. I think it's a great layer under my shell, but without, any wind just cuts right through. As far as warmth/weight goes, it's more akin to a hoody than a jacket. Warmth-wise it's like a flannel shirt that You might wear over a t-shirt in the morning until it warms up a bit.

The pocket layout is so-so. The hand pockets are fine, but the upper arm pocket is on the small side. The chest pocket would be much better with outside access instead of hidden inside. That makes keeping your phone or ipod there less convenient.

So, overall, it's comfortable and good looking, but if you really want one I'd try to catch it on sale, because I think at full price there are better values in more versatile jackets.

If you wanted warmth as a jacket the 300 gram jackets do fine without a shell. This puppy was made for layering and as a lightweight warmup. I have one and used as it was intended, it is a beautiful thing to behold.

I am 5'll and about 160 was wondering what...

I am 5'll and about 160 was wondering what size to order


NOT Over Reacting

  • Familiarity:I've used it several times

This is a great little fleece jacket. The 100 micro fleece layers easily when needed and is fairly warm by itself. But the standout thing is the feel. You feel like you have just won the lottery and are walking down a street at night with tons of beautys staring at you when wearing this thing. A work of art. The hood is there for when the winds wake up. Buy this. I am soooo glad I did.

is this jacket more of a slim or loose...

is this jacket more of a slim or loose fit?



    This is by far my favorite warm layer. The polartek wool is amazing and super soft even after countless washes. I've used this as a mid layer under my shell while Skiing and for winter ascents in the Adirondacks and the white mountains. It is tremendous on and off the mountain.



      Wow! I love this thing so much I just ordered a second. Extremely warm, fits perfectly under my marmot precip, and looks really awesome too. Amazing fleece mid-layer for autumn hikes, cold fishing mornings, spring skiing, and any other adventure. This is my favorite piece of clothing hands down. I wear it around my house and going out constantly and have had several people ask about it at bars since the fleece is so light/fluffy.

      This is a fantastic product: well made, right feel. Bottom Line: It meets my requirements perfectly!