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Aconcagua Light ML Jacket - Men's

4.421052631578948 out of 5 stars
19 Reviews


Size Chart


Mammut Aconcagua Light ML Jacket

The light version of our classic performance fleece, this technical midlayer is all bang and no bulk. Designed to solve for a whole range of outdoor activities, its Polartec Power Grid fleece fabric offers high breathability and efficient moisture management at an incredible warmth-to-weight ratio. With a lightweight construction, soft hand-feel, and close-to-body fit for easy layering, its the ideal style for ultimate comfort through the summer and tricky transition seasons.

Responsible Collection
Bluesign Approved, Recycled/Repurposed
Polartec Power Grid (89% polyester, 11% spandex)
Fleece Weight
2 zippered hand
Claimed Weight
hiking, climbing, skiing, snowboarding, backpacking, mountaineering, trail running, road running
Manufacturer Warranty
2 years

Overall Rating

4.5 based on 19 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 2 reviews
4 Stars - 4 reviews
5 Stars - 12 reviews

What do you think about this product?


Selecting an option will reload the available reviews on the page
5 out of 5 stars

March 4, 2024

Awesome sweater

Comfortable, warm, breathable, and sharp looking too. I've tried a lot of nice fleece and wool pieces. This is one of the very best.

Originally reviewed on

3 out of 5 stars

April 10, 2023

Too long

Great jacket but the sleeves and general length is oddly too long.

Mark W

Originally reviewed on

5 out of 5 stars

April 3, 2023

Great Jacket

Great mid layer. versatile for multiple winter sports. Fit is a bit loose.

Christian T

Originally reviewed on

3 out of 5 stars

February 28, 2023

style over substance

Comfortable and stylish (till the logo started peeling off a bit at a time). Unfortunately, mine had a defect in the seam on arrival and the logo came off within a few months, also had some pilling. Functionally similar to R1 or other light fleece.

Luke W

Originally reviewed on

5 out of 5 stars

February 2, 2023

This is my go-to midlayer for ski touring. Using this with a baselayer has been a game changer for staying comfortable while ski touring -- it's just warm enough, and breathable.

Originally reviewed on

5 out of 5 stars

February 1, 2023

Awesome Layer

Light well-made layer! Great company too. I am never disappointed with MAMMUT! This runs large just so you know but it is really nice to have a Lightweight fleece for any time of year. I use this around the house, skiing, and while playing disc golf. Love this piece, I wish they had more color options but black goes with everything so it works. I took this to Europe and was super stylish on both sides of the pond! Cheers!

Dana L

Originally reviewed on

5 out of 5 stars

November 8, 2022

Warmth,fit, stretch, breathability! This jacket has it all. Perfect as a midlayer for warmth and as an outer layer for high exertion activities.

Joshua K

Originally reviewed on

5 out of 5 stars

October 17, 2022


So far used this for an autumn evening out, walk along the beach at sunset, and a chilly evening mountain bike ride...looks and feels great!

Originally reviewed on

4 out of 5 stars

September 19, 2022

Feels decent, but no pockets

I've enjoyed this light jacket, it is a little loose fitting and is a little on the lightweight side. I will most likely wear this more as a mid layer. Oh yeah, and there's no pockets of your hands or anything else, just the one chest pocket, took me off guard.

Originally reviewed on

5 out of 5 stars

July 8, 2022

Fits true to size. Not too tight like a baselayer, but snug enough to feel comfortable. There aren't any hand pockets, but the chest pocket is a nice piece. Material is very comfortable! Definitely thin enough like a track jacket, but is warm enough to be comfortable at mid 50F temperatures with a t-shirt underneath. The style is really nice as I always get compliments whenever I wear this.

Matt M

Originally reviewed on