Marmot Men's Reactor Pant

Marmot Men's Reactor Pant is rated 4.5455 out of 5 by 11.
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Product Description Item No.   10018055

The Men's Reactor Pant by Marmot. For the ultimate in lounging, or for a truly cozy mid-layer, the Reactor fleece pant is the pinnacle of comfort.

FEATURES of the Marmot Men's Reactor Pant

  • Polartec Classic 100 Micro
  • Back Zip Pocket
  • Elastic Draw Cord Waist

- + Product Specifications
Weight: 10 oz
Fabric Details: 100% Polyester Micro Fleece
Product Technology: Polartec Classic
Fabric Weight: 4.6 oz / Square Yard
Pant Rise: Mid
Clothing Fabric: Polyester
Gender: Mens
Features: Packable
Best Use: Casual, Fitness
Fit Type: Regular Fit
Polartec Classic

Polartec Classic
Polartec Classic has a lofted fiber structure that creates thermal air pockets to prevent convective heat loss and regulate core warmth. It works great with a layering system or worn alone. Durable, fast-drying, weather resistant, soft to the touch and made of candy. That very last part might not be true.


Men's Outerwear & Clothing
  XS S M L XL XXL XXXL
Chest - 36 - 38" 39 - 41" 42 - 44" 45 - 47" 48 - 50" 51 - 53"
Neck - 14.5 - 15" 15.5 - 16" 16.5 - 17" 17.5 - 18" 18.5 - 19" 19.5 - 20"
Sleeve - 32 - 33" 34 - 35" 35 - 36" 36 - 37" 37 - 38"
Waist * - 28 - 30" 31 - 33" 34 - 36" 37 - 39" 40 - 43" 44 - 46"
Hip - 38 - 40" 40 - 42" 43 - 45" 46 - 48" 49 - 51" 52 - 54"
Inseam ** 31" 32" 32.5" 33.5"

* Trail-to-Town pants have specific waist sizes.

** Inseam lengths above are average size lengths. Some pants are available in additional inseam lengths and will display on the product page.

Men's Gloves
XS S M L XL XXL
6.5 - 7" 7 - 7.5" 8 - 8.5" 9 - 9.5" 10 - 10.5" 11 - 11.5"

* To find your Marmot glove size, use a flexible measuring tape and measure your hand around and over the knuckles with your fingers together, excluding your thumb.

Men's Tops Fit Guide
Athletic Semi-Fit Regular Relaxed

Tailored shoulder and fitted hem

Relaxed shoulder and tapered hem

Relaxed shoulder and straight hem

Dropped shoulder and loose hem

Men's Bottoms Fit Guide
Athletic Semi-Fit Regular Relaxed

Fitted at waist, fitted thru knees, and fitted cuff opening

Fitted at waist, tapers at knees, and straight cuff opening

Relaxed at waist, slight taper at knees, straight cuff opening

Loose at waist, straight thru knees, straight cuff opening

- +
Rated 4 out of 5 by from Cozy and comfy I've been wearing these pants for years. They are the most comfortable of the different fleece pants I've tried. However, I preferred the older version with the pockets on the side seam (more flattering). Also, the rise (crotch to waist) is now shorter, which I don't care for. Nevertheless, I will continue to buy and wear these pants. I live in Colorado, and winters are very cold. Jeans just don't cut it!
Date published: 2015-11-13
Rated 5 out of 5 by from Warmest lounge pants ever I've owned this pant since 2009. Its extremely warm. Its slightly thicker than a pair of flannel lounge pants that I also own, but much warmer. I'm not one to typically wear more than a baselayer and a softshell for winter activities, but these would layer nice if you chose to do so.
Date published: 2014-02-09
Rated 5 out of 5 by from Thin and warm Yes love the product. My husband had them and I was wearing his before I purchased my own.
Date published: 2015-03-19
Rated 3 out of 5 by from More pockets Wish these were 3" longer and they need 4 pockets, not just 1!
Date published: 2015-02-16
Rated 5 out of 5 by from Perfect for living in. I wear these all day everyday. These really are perfect for any situation (except the office I guess). They are pretty lightweight and feel a little more thin than I expected, but they are still warm and incredibly soft. ,,,,All and all the perfect, go to pair of sweatpants. I am wearing them right now (no matter when you are reading this review it is likely this will not be a lie). Did I mention yet that they are comfortable?
Date published: 2011-03-19
Rated 5 out of 5 by from Super Comfy These pants are a perfect midlayer. Everything about them is great. The quality is amazing and they are great to even wear around the house. They are super light so they don't take up much room or weight in a pack when going on long trips. I love buying marmot products, they are always made very durable and handle anything that i throw at them. Everyone should own a pair of these pants.
Date published: 2011-07-28
Rated 5 out of 5 by from Putting these on puts a smile on my face These fleece pants are so comfortable I catch myself smiling every time I slip them on. Warm and light weight as well. I also like that they're not super-baggy; other fleece pants can make me look like some giant, pear-shaped lard-ass. Quality fabric and construction, as you would expect from Marmot. Pick up a pair of these, you won't be disappointed.
Date published: 2012-08-07
Rated 4 out of 5 by from Not your typical fleece pants I thought these fleece pants weren't going to hold much warmth poor insulation, but was I wrong?!?! They worked well in the arctic at -10 F. How cool is that? They are no windstoppers, but they are perfect as an insulation layer. Get a pair and see for yourself.
Date published: 2008-07-05
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How is the waterproof-ness of the pant?

Asked by: Song
The Reactor Pants are not waterproof per say however they are made with PolarTec Classic Micro which will dry pretty quick if it happens to get wet.
Answered by: James
Date published: 2015-07-06
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