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Mountain Hardwear
Absolute Zero Pant - Men's

3.8333333333333335 out of 5 stars
6 Reviews
Color:Dark Storm


Size Chart


Why We Like The Absolute Zero Pant

The Absolute Zero Pant has been carefully designed by guides and mountain athletes to protect expeditionists from the worst possible conditions we may encounter at our destination. The 800-fill goose down insulation and welded baffle construction retains body heat to the highest degree. Reinforced panels at the seat and knees ensure durability as we navigate exposed ridges and steeps with razor-sharp shale or granite. The insulation within the pants is RDS-certified, Fluorine-free, Allied Down—the most responsibly down insulation currently available by today’s standards.


  • Heavyweight pants suited for cold-weather mountaineering
  • Goose down insulation supplies heat retention and breathability
  • Welded baffle construction offers waterproofing for inclement weather
  • Insulated bib provides key temperature regulation in your core
  • Zippered entry wraps around the rear of the garment for easy entry
  • A plethora of well-placed pockets secure nutrition, tools, and essentials
  • Item #MHWZ9AT
Responsible Collection
Bluesign Approved
[face fabric] 20D Pertex nylon, [reinforcements] 30D Pertex nylon
800-fill goose down
[short] 30in, [regular] 32in, [long] 34in
2 zippered hand, 2 zippered chest
external adjuster
adjustable suspenders
Claimed Weight
[medium] 2lb
Manufacturer Warranty

Overall Rating

4 based on 6 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 1 reviews
5 Stars - 3 reviews

What do you think about this product?


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1 out of 5 stars

May 25, 2024

Can’t don and doff with boots on despite the full zip

You can’t don and doff these full zip pants with both feet on the ground. You can’t don and doff these pants while keeping skis on, crampons on, or boots on. All because the end of both zippers are closed. Even if just one end of one zipper was open (like the main zip on the parka) this would all be possible and you could don these at a moments notice. I don’t know if this is a critical oversight or misguided design. It is very unfortunate that a small choice (a millimeter sized area) had such a large impact on functionality, on an otherwise well made and well designed garment. For those having trouble visualizing without owning the pants, there are 6 zippers, you can move them all to the end of one pant leg (where the cuff remains closed and won’t accept a boot), all to the other pant leg (same), all to the top mid back where’d you’d have to try to climb in to the pants on the ground from the suspender side, or anywhere in between. There are always zips holding the two sides closed, despite the garment being one piece anyway, no matter where you move the zips. This inability for the zipper to detach at least at one end is what prevents these from being put on like a jacket and zipped up in place boots and all. Full zip pants without full zip functionality.


Originally reviewed on

5 out of 5 stars

December 13, 2023

Great cold-weather choice

Living in central Alaska, these get worn frequently. And the durability seems really good. I haven’t had a an opportunity to take some below -20 yet. But the ability to open them and ventilate them it’s really great when you start working hard on the steep uphills. I haven’t had to put a shell over them and they seem to block wind well with a matching jacket on I’ve been in windchill temps below -40 and been really comfortable.

Off grid Greg

Originally reviewed on

5 out of 5 stars

August 5, 2023

Going to use for Alaska Paired with Phantom Parka

The Absolute Zero Pants are exactly what I wanted for winter around Fairbanks, Alaska. We experience lower than -50°F with wind chill and therefore I was looking for expedition pants. The pants feature extremely dip pockets, the picture measures almost 13in which is deep enough for my expedition mittens. Additionally being able to zip open the rear is extremely useful when trying to use the restroom, especially in a dry cabin with no heat. The bib upper is comfortable and has two chest pockets big enough for your phone, batteries and snacks. The front two way zipper opens all the way. The back has six two way zippers that can be used to open the seat, undo the leg from the bottom to put the pants on and have a side vent open to release heat. At first the zippers are a little confusing since you first see four zippers all bunched up together and one zipper on each hem of the legs. You just need to practice to get familiar with the zippers. The velcro adjustable hems are not necessary for my double boots, but if you have smaller boots you can make it tighter. Even thought it is elastic and it also features two holes if you want to tie a cord to act as a boot gaiter and prevent the hem from rising in deep snow. Last winter, before I had these pants, I tried dry tooling (climbing with axes and crampons on rock free of ice/snow) at -30°F and I was extremely cold from my legs while wearing synthetic belay pants. That’s when I realized I needed some serious expedition pants. I am excited to use the Absolute Zero Pants for the first time this winter and have no doubt they will withstand the coldest temperatures I’ve experienced in Alaska.


Originally reviewed on

5 out of 5 stars

June 8, 2023

Excellent Fit and Finish

I was a little worried about sizing, but these ended up fitting like a glove. I have a 32" inseam and I wear 35" waist jean. Around my belly at the widest point I'm 40", and when I zip these up, they are comfortably snug ( I'm also packing an extra 5 or 10 lbs at the moment) They are super light and very well constructed. Good zippers. The chest packets are small, the front pockets are roomier an more useful. Suspenders are well constructed. I received these in summer so I can't attest to warmth, but walking around in my back yard, I can tell you they are easy to walk in, and afford a full range of motion. Judging by the loft, I'm pretty confident they'll be very warm.

Originally reviewed on

4 out of 5 stars

December 18, 2021

Arctic Circle Endorsed/Short Legs

Well, awesome; but, short legs. I wear Mucks with Katoohlas usually so no exposure to Arctic weather; however, undeniable... "high water pants."

user image

Originally reviewed on

3 out of 5 stars

January 23, 2021

Short Legs

The usual Mountain Hardwear product quality. However, the legs of the pants are somewhat short, and thus, would benefit from "stirrups" at the leg ends. Also, for the same reason, "snow skirts" inside the leg endings might help for use in deep snow.


Originally reviewed on