Weight 7.8 oz (Size M)
Fill Weight 2.0 oz
Fabric 20-denier rip-stop nylon, 25-wash rated DWR treatment
Insulation 800 fill power goose down


So warm and light, there's no reason to leave them…

Rating: rated 4.5 of 5 stars
Source: bought it new
Price Paid: $110


So warm and light, there's no reason to leave them at home!


  • Warm
  • Lightweight
  • Comfortable fit


  • The snap/closure drawstring is a little funky

I was looking to extend my backpacking season beyond just summer, and wanted to add a warm lower layer to my kit. And in the never-ending quest to lighten my backpacking load, it also had to be lightweight. Having had a MontBell UL Inner Down Jacket for several years, and loving it, I naturally looked at this layer. When I found it on sale, I went for it.

Even though I have short legs, the pants fit quite nicely, with elastic cuffs at the bottom. The waist has a adjustable drawcord on the inside, but a traditional fly zipper/snap in front. Minor quibble... the zipper/snap have to be open to adjust the drawcord, which is a little awkward. But I can't say how I would change it to make it better.

These pants are warm! The 800 fill-power down is distributed nice and evenly throughout the pants, with no cold spots. I have successfully used them to extend the temperature range of my 35° summer bag including several sub-freezing nights in the Yosemite backcountry in early spring and late fall. The quilted nylon fabric is soft and comfortable, and the fit is non-restricting.

These pants are super-light (8 oz on my scale), and pack down tiny in the provided stuff sack. If you are looking to extend your season, and want a lightweight and super warm layer, look no further. Love these pants!

Update March 2016: I had forgotten how great these pants are. On a recent snowy trip to the Hetch Hetchy region of Yosemite, they kept me ultra-warm from the time the sun went down, to sunrise the next morning.

Me, rocking the MontBell UL Inner down pants:



Sound warm! Thanks for sharing.

5 years ago

Thanks for the update, David. Glad to hear they're still working out well for you.

4 years ago

Where to Buy

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The MontBell Men's U.L. Down Inner Pants is not available from the stores we monitor. It was last seen August 29, 2014 at Bentgate.com.

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