Mammut Eigerjoch Light Insulated Jacket - Men's

Incredibly light, versatile, and durable.

A trustworthy insulation layer is indispensable in any winter outdoor pursuit. You need to be certain that it will keep you warm and comfortable even when wet, and it needs to be versatile enough to perform multiple duties. The high-tech Mammut Eigerjoch Light Insulated Jacket fits this description, and is perfectly suited for backcountry and mountaineering expeditions in winter climates.

The outer fabric on this jacket is the venerated Pertex Quantum, a featherweight, wind blocking, water resistant, breathable material. Polartec Powerstretch panels on the sides and back combined with high-reach sleeves and thumb loops give the jacket exceptional range of motion when you're reaching overhead. The extremely breathable, lightweight, and fast-drying Polartec Alpha insulation is very effective at regulating body temperature during high-exertion and stop-and-go activities.

Due to the design of this jacket and the exceptional robustness of the Pertex Quantum fabric, The Eigerjoch can be worn either as an insulation layer or as an outer layer in the place of a softshell. Two concealed hand pockets and a zippered chest pocket provide storage if indeed the jacket is being used as outerwear.

  • Pertex Quantum body with Polartec Power Stretch Pro side and back panels
  • Polartec Alpha insulation
  • Athletic fit
  • Two concealed hand pockets
  • One zippered chest pocket
  • Reviews
  • Q & A

Blown Away

  • Familiarity: I've used it several times
  • Fit: Runs small
  • Size Bought: XL

I have a love for Mammut gear as it has always exceeded my expectations and this jacket is no different. Looks great, feels great and is the perfect balance if weight, warmth and heat dispersal when active. Highly recommend.

My go to jacket

  • Fit: Runs small
  • Size Bought: XL

First off, it runs a bit slim. I sized up to an xl, fits great.

I bought an older cyan blue version 3 years ago. This has been my go to jacket ever since, even becoming chris's "blue jacket" to my friends.

I have used it as my warmth during summer evening backpacking, my top layer while ice climbing on a dry day, a loft layer under my shell on a cold wet snowboard day, stuffed in a pack while I mountain bike or rock climb as a warm up layer at halts or on belay.

I run hot, this jacket dumps excess heat under the pits and along the sides. The insulation keeps my core shielded from the elements. The length means it stays under my harness, and the sleeves stay at my wrists. It keeps me warm if I'm active at -10°F and add a shell, and it's comfortable for relaxing at a belay or in a hammock at 40°F. It looks good for a tech jacket too, maybe not GQ, but certainly good enough for your aprés-ski activities.

Things it doesn't do so well: the material shed its DWR coating pretty quick, so in wet weather its not my first choice of outerwear. In cold, windy weather the large section of un-insulated stretchy material let the wind in - so I have to add a shell.

Overall, I highly recommend this as it is my go to outer and mid layer.

Mike H

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: Large

Nice light jacket. Well made. Sleeve length is good. Jacket runs small. I am 5'-10, 166lbs. I had to return the jacket because it was too tight around the mid section.

Mammut Eigerjoch Light

Mammut Eigerjoch Light

Ups and downs

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

I got this coat as a Spring/Fall windbreaker for my cycling rides (usually like 20-30mi) and just a general around town coat.

-It's great for cycling because of the long sleeves and thumb holes - it won't ride up on your arms.
-It's also very sharply styled. It's drawn a lot of compliments from people.
-It's very fitted for the ectomorphic, long/lean type of frame. I'm shaped like that so it fits like a glove. If you are a stocky, muscular build, this won't fit you no matter the size.

-It just isn't very warm. Anything under 40F/5C and you're in trouble. It's significantly less warm than my older, similar style Stoic jacket.
-Quality is subject - see my photo. Stuffing is coming out of this thing with only about 25-30 wears on it. At this price, that's not acceptable. Zippers are also questionable and get stuck on occasion.

Ups and downs

Favorite midlayer

Warm, Lightweight, Agile Multitasker

Favorite midlayer

Warm, lightweight, agile multitasker

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

We love this top - it's a great mid layer that doubles up as a light outer layer when moving up in the alpine.

We love:

1) stretchy side panels that allow freedom of movement and heat escape

2) super warm core insulation

3) lightweight and packs small

4) extremely flattering fit!

Warm, lightweight, agile multitasker
Unanswered Question

Is it reasonable to use Mammut Eigerjoch LIght Insulated Jacket (Men's) under Tech, Pro Shell (Like Nordwand Pro Jacket) as a second layer?

Great Jacket

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: Runs small

Slim fitting (definitely order one size up), comfortable, great pockets (easily stow gloves/hat if it gets chilly or your activity level changes) and looks great with the bright color accents (I bought the black one. Not many people own a lightweight full zip that is this attractive).

Does this jacket stuff into a sack or its...

Does this jacket stuff into a sack or its own pocket for storage?

Being as it is a insulated jacket I don't believe it will stuff into its own pocket but it might be able to squeeze into it. It most likely is not designed to do it. Sorry I cant help you out any further.

Best Answer

The answer sadly is it doesn't come with a stuff sack to stuff into and it won't pack into it's own pocket.

It wont stuff into it's own pocket but it's super super compact and light. I've had zero problems taking this thing around on a couple fall hikes.

Men Jackets Men's Synthetic

Hi all. Can anybody advice me is it reasobanle to use Mammut Eigerjoch Light Insulated Jacket - Men's under Gore-Tex Pro Shell like Nordwand Pro jacket? thanks in advnce.