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This simple yet breathable jacket by Marmot is perfect as a mid-layer for extra warmth or as a great outer layer.
Polartec Classic fabrics set the bar for lightweight warmth and breathability. On the market and used by outdoor professionals for nearly three decades, this original fleece offers unparalleled quality and durability.
Zippered handwarmer pockets for convenience.
Zippin compatibility so you can zip in a fleece jacket for extra warmth.
Wind flap behind front zipper with chin guard.
Full front zip closure.
General performance cut for a multi-sport fit.
Designed to fit over a light layer.
S40 g. (12 oz).
Polartec Classic 100 Micro 4.6 oz, 100% Polyester.
Machine wash cold and tumble dry low.
Product measurements were taken using size MD. Please note that measurements may vary by size.
All of the classic components of what a fleece should be come together in Marmot's Reactor Full Zip Jacket, a Polartec 100 fleece that layers well with a shell or makes an excellent standalone in moderate temperatures. Great for climbing, biking, or any sport that requires a helmet - full zip design means your helmet can stay on if your fleece needs to come off.

The Marmot Men's Reactor Full-Zip Jacket is a cleanly designed, super soft, lightweight pile jacket.
Built with Polartec® Classic 100, the Marmot Reactor Full Zip Jacket for Men is the ideal fleece jacket for just about any time of year. The Reactor is Zippin™ compatible and complements your Marmot ski jacket perfectly when the temperatures drop and serves as the ideal fleece for a cool autumn walk in the park.
Marmot Reactor Full Zip Jacket: If you’re looking for bright colors and awesome secret hidden pockets, you’re probably not going to be too excited about the Marmot Reactor Full-Zip. But if a simple, functional, no-frills or fancy doodads pullover is what you’re looking for, the Reactor is your man. Zip it up nice and snug when the wind picks up or unzip and let your chest hair hang loose. And I can guarantee that if you do that, you’re sure to elicit a reaction.

The Marmot Reactor Full Zip Jacket is a cleanly designed, super soft, lightweight pile jacket. Wear the Reactor for warmth on the slopes, or as a sharp-looking, cool-weather outer layer.
Marmot presents you with a powerful ally in the never-ending struggle for the perfect layering combination: The Men’s Reactor Full-Zip Fleece Jacket. In combination with your favorite shell, this jacket’s Polartec Classic fleece keeps you toasty on those mild days; if that shell happens to be missing a comfy chin guard, you’re in luck. The Reactor Full-Zip will also warm you up on those early fall and sunny winter days unless you’re walking into a raging wind or storm.

Simple, super soft, lightweight pile jacket. Wear it as a zip-in mid-layer for extra warmth on the slopes, or as a good-looking, cool-weather outer layer.
Polyester microfleece.
Zippered hand pockets for convenience.
Zippin¢ compatibility so you can zip in a fleece jacket for extra warmth.
Shell: Roost P-480.
Standard Fit: A general performance cut for a multi-sport fit.
Weight: 12 oz (340 g).
Product measurements were taken using size MD. Please note that measurements may vary by size.
The Marmot Men's Reactor Full Zip Jacket's 100-weight Polartec fleece material gives you just the right amount of insulation for mild winter days or aerobic activities in cold weather. The versatility of a lightweight fleece cannot be understated. Wear the Reactor Jacket as a mid layer for skiing, climbing, backpacking, snowshoeing, or whatever you happen to be doing. Slip your hands into the insulated pockets to re-warm your digits on a chilly day on the trail.

This is a cleanly designed, super soft, lightweight pile jacket. Wear the Marmot Reactor Full Zip Jacket for Men for warmth on the slopes, or as a sharp-looking, cool-weather outer layer.

Marmot's Reactor Full Zip Jacket is a 100 weight fleece jacket that has a serious focus on functionality and comfort. The Angel Wing Movement allows for freedom of movement, and the wind flap locks out the cold and provides a comfortable barrier from cold zippers.

Simple, super soft, lightweight pile jacket. Wear it alone on chilly days or as a zip-in mid-layer for extra warmth on the slopes.
This is a cleanly designed, super soft, lightweight pile jacket. Wear the Reactor for warmth on the slopes, or as a sharp-looking, cool-weather outer layer.
No description provided.
| Country Of Origin: | Thailand |
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| Fabric: | 100% polyester fleece |
| Fleece Weight: | 100 |
| Manufacturer Warranty: | Lifetime |
| Material: | Polartec Classic 100 Micro |
| Pockets: | 2 Hand |
| Recommended Use: | Layering, hiking, climbing |
| Weight: | 14oz (340g) |
| Windproof: | No |
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View other products from Marmot classified in Men's Clothing > Jackets & Vests. View all products from Marmot.
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Sometimes, we can't be sure that the product is the same across the stores that offer its, so you may find the same product listed more then once on GearBuyer.com, we these list highly similar products below.
| Marmot Reactor Jacket | $44.93 - $80.00 | |
| Marmot Reactor Half Zip Jacket | $49.90 - $70.00 | |
| Marmot Reactor Half Zip | $29.97 - $70.00 |
Sometimes brands make complementary products for the opposite gender that coordinate with this product, we also try to show these products below.
| Marmot Reactor Jacket - Boys | $50.00 |
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| Marmot Oracle Jacket Women's Clothing > Jackets & Vests | $47.99 - $165.00 | |
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Use this chart to find which retailer offers this product in the size, color or other options that you desire. Click on the price to purchase.
| Color | Size | ||||
|---|---|---|---|---|---|
| Small | Medium | Large | Extra Large | Extra Extra Large | |
| Coal | 79.9580.00 | 79.9580.0080.00 | 79.9579.9580.00 | 79.9579.9580.00 | 79.95 |
| Bonfire / Afterdark | 33.73 | ||||
| Dark Cedar | 47.17 | ||||
| Forest | 79.9580.00 | 79.9579.9580.00 | 79.9580.00 | 79.95 | 79.95 |
| Deep Blue | 79.9580.0080.00 | 79.9579.954 More... | 79.9579.954 More... | 79.9579.953 More... | 79.9582.00 |
| Tempest | 77.00 | 44.9577.00 | 44.9577.00 | 77.00 | |
| Black | 79.9579.953 More... | 79.9579.954 More... | 48.9579.955 More... | 44.9548.956 More... | 44.9779.955 More... |
| Limestone | 80.0080.00 | 79.9580.0080.00 | 79.9579.952 More... | 79.9580.0080.00 | |
| Cayenne | 80.0080.00 | 80.00 | 80.0080.00 | 80.0080.00 | 79.9580.00 |
| Fire | 79.9580.00 | 79.9580.0080.00 | 80.00 | 41.2280.00 | |
| New Black | 77.00 | 77.00 | 77.00 | 77.00 | |
| N/A | 54.90 | 54.90 | 54.90 | ||
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Excellent Addition to the Layering System | |
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The Marmot Reactor fleece doesn't fall shy of Marmot's high reputation for gear. The jacket is very comfortable and fits pretty true to size. As someone has already pointed out in a previous review, if you're purchasing the reactor as a solo outerwear piece and expecting to stay warm in freezing temperatures, look elsewhere. However, the reactor serves as a nice and very functional midlayer, even with the lower fleece weight of 100. I also own a Marmot Tamarack outer shell jacket that can house the reactor as a zip-in. With a moisture-wicking baselayer beneath, this is a great combination, as I use it for backpacking and hiking. If you're interested in a heavier zip-in midlayer for a Marmot jacket, you might also check out the Marmot Warmlight fleece (similar to the Reactor but with heavier 200 weight fleece)but as long as you're purchasing the Reactor fleece with reasonable and appropriate climate expectations, you can't go wrong with this one! | |
| Justin Buckles at Backcountry.com Outlet on 11/28/2008 | |
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| Decent lightweight fleece - Great bonfire color; decent for fall mornings. Not wind or water resistant. Marmot changed their "zip-in" style of zippers a few years ago, so if you have an older Marmot shell, you may have some problems using newer zip-in linings. I was able to retrofit the zipper on this fleece pretty easily to zip-in with a Marmot ski shell I purchased around 1999-2000 (but don't expect that you can necessarily do the same). The sleeve loops are still in the proper place for attachment with the older shells. I use this fleece by itself for dry days when it's down to about 45-50. Any lower than that and my Marmot Sharp Point soft shell comes out. | |
| Anonymous at Zappos.com (2009) on 05/04/2008 | |
Excellent Midlayer | |
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I don't see what all the fuss is about... Others who have reviewed this piece negatively seem to have expected the wrong thing from it. This is an excellent LAYERING piece. No, it doesn't cut wind or keep you warm as an outer layer; that's not what it's supposed to do. I bought mine a bit small, and the tighter fit works excellent for layering underneath my down jacket or softshell. Get it on sale, and you won't find a better layering piece for the price. | |
| Jon Woodhouse at Backcountry.com Outlet on 11/20/2008 | |
Excellent light fleece layer ... | |
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I bought the vest at first in the reactor series .... i loved it, decided i wanted the same light option, but with sleeves for early spring and late fall ... Wind does rip right thro it, but as under a wind shirt or rain/wind shell .... its a perfect light fleece option, pockets and an inner pocket for ipod/mp3 ... I'd buy it again and trust marmot's quality ... I own several pair's of their clothing and never returned an item. | |
| Jason McElroy at Backcountry.com Outlet on 03/10/2009 | |
good light fleece layer | |
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echoing previous reviews - good midlayer, not good stand alone. purchase for added insulation. took it on a month long mountaineering trip and it served me well on travel days where it was too cold for just a shirt, but not quite at a level for a insulated puffy jacket. if the wind hits big time, or if you sit down for a rest, throw on a wind layer. you'll need it | |
| wml2302240555 at Backcountry.com Outlet on 08/15/2009 | |
Soft, simple & sweet | |
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Marmot may have the very softest fleece out there. This is a lightweight, comfortable jacket & super soft. Cut a little fuller than some of there other jackets, as I am 5'10", 160 lbs and usually like to wear a large, but I am right in between a medium & large in this jacket. Looking for a firly basic lightweight fleece jacket - can't go wrong here! | |
| Mr.Fin at Backcountry.com Outlet on 12/25/2008 | |
Not Bad | |
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It is a good fleece for morning workouts. It wicks well and keeps the chill off. The jacket is light fleece, so you get what is advertised. I have a 40 chest and the large was a little big, but I can still layer it without a problem. I would say it is true to size since the chart states I should have bought a medium. | |
| Wormy at Backcountry.com Outlet on 09/29/2008 | |
REACTOR Reaction | |
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It is light and works perfect as a second or outer layer for my winter trail running or snowshoeing. Maybe as a light fall or spring jacket but it is too light to be a primary in any real cold weather. It does what I bought it for. Price is reasonable when on sale and has Marmot quality. | |
| runswift1986777 at Backcountry.com Outlet on 12/22/2008 | |
Great everyday fleece | |
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I purchased the Reactor fleece about a month ago and since then, it's packed with me whenever I head out. It seems to have a great weight-to-warmth ratio which I wasn't expecting. While this fleece is great as a mid-layer, you can definitely use it everyday even when temperatures get below freezing. | |
| THOMAS ARMENTO at Backcountry.com Outlet on 02/06/2009 | |
nice mid-weight fleece | |
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| I love the fit of Marmot jackets. I'm 6'3" with a long torso and 35" sleeve. This jacket fits me good. I wear it under a Marmot Minimalist gtx shell and it keeps me warm in the cold winter weather. Both jackets have plenty of sleeve length and pair up nicely. | |
| Darren at Altrec Outlet on 02/14/2009 | |
Thin Fleece | |
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This is an okay fleece for a liner, but it's paper thin and the wind would rip right through it. I returned it...so that's all I got | |
| eben331703593 at Backcountry.com Outlet on 02/10/2009 | |
Junk | |
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It looks like it was purchased at Kmart. It's not worth the sale price. I sent it back. | |
| slinky at Backcountry.com Outlet on 09/12/2008 | |
light fleece, acts accordingly | |
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really light fleece, acts accordingly for wind - doesn't have any stopping power, but that's not why you're buying this fleece. good for a layer over a base when it's not cold enough for a 300 weight, but too chilly for just a t-shirt. haven't taken it out on any trips yet, but will. feels like the fleece around the zipper part at the bottom is wearing thin already. THREE STARS! | |
| wml2302240555 at Backcountry.com Outlet on 03/07/2009 | |
Marmot reactor. | |
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When It says light fleece,its light bloody fleece.Very light weight good for layering,but not good on A chilly day by its self.Good for exercise training or walking your dog in the afternoon. | |
| jb_rigger1551640 at Backcountry.com Outlet on 09/01/2008 | |