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Alpinism Mountaineering Pants

Sale price: $50.00 Regular price: $74.99

These pants provide excellent thermal regulation. They are both comfortable and durable with reinforced protection against crampons at the bottom of the leg.

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This product runs small

Sale price: $50.00 Regular price: $74.99

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Final Sale: No returns or exchanges

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8495175

Product Videos

Product Features

Alpinism Mountaineering Pants | These light and stretchy pants were specifically designed by our team of mountain guides for 3-season mountaineering (spring, summer, autumn).

These pants provide excellent thermal regulation. They are both comfortable and durable with reinforced protection against crampons at the bottom of the leg.

A photo of the Alpinism Mountaineering Pants in use

Freedom of movement

Gusseted crotch, pre-shaped knees, 8% spandex stretch fabric.

Abrasion resistant

Reinforced component on lower leg (15% Aramid), fabric weight = 6.8 oz/m2.

Water repellent

Water-repellent component can handle light rain but is not waterproof.


Quick-drying, highly breathable and lightweight fabric.


3 zip pockets, including 1 thigh pocket, easy to access wearing a harness


Gusseted lower leg for wearing with ski boots.


Adjustable waistband.

Product Customer Reviews

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209 Reviews
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Alpinism Mountaineering Pants,carbon gray
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Love these pants, hate Decathlon's American sizing

I first purchased these pants three years ago after a friend's recommendation. They lasted two seasons until I destroyed them on a glissade. They are stretchy, breathable, light protection and the ankles have crampon patches. Now, for the bad part. And this is an ongoing struggle with Decathlon in the US. THE SIZING, the inconsistent, multiple-sized clothing. So, I ordered a pair in Large. I am sent a pair with a shopping tag that says M/L and the inside tag says it's a US S/M. Please tell me how this makes sense to anyone? They do say to size up, which I did, but a S/M is very different from an L or even a M/L. This is a constant battle with Decathlon because they aren't consistent and there is no reason they should market one size on their website, have a different product tag for in store shopping and yet another different one for inside the pants. Unfortunately, these are not pants that are regularly stocked in SF or Emeryville, so you have to play the game of ordering them and then play a return, exchange, order a new pair.

Super pants

I love these pants and ordered another pair. They do fit small, I am normaly a small and ordered a medium based on other small sizing products from decathlon. Im glad I did, the medium fits nice. They real color is dark grey which I like.

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Nice overall

Like the design, especially the fit, the belt, useful pockets. The lower leg patch feels a bit rough on skin, doesn't go well with ankel socks. The stretchy frabics for the trousers are quite warm (for winter in hk) and rather abrasion resistant, although it gets hairy after a few exposure to rocks and other rough surfaces. The belt seems to need a stronger sewing work as it seems to start falling off. Got it at a higher price :(

Very good fabric & product. Design could be much better

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Great buy

One can wear them for at least a couple of days. Comfortable. Used it on long drives too.

Great trekking pants!

They have the right amount of stretch. The cuffs on the inner side of the ankle are hardy when worn with boots. Accessible zippered pockets

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Отличен панталон

Панталонът е супер за целогодишна употреба, но не е непромокаем. Здрав и е еластичен, което го прави много удобен

Закупен е от мен като подарък.

След еднократна употреба стои много добре, лек и удобен за пътешествие в планината.

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Dámské lezecké kalhoty

S kalhotami jsem velmi spokojena. Příjemný materiál. Používám je do města, ale i na turistiku.

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Jsem velmi spokojena:)

Jsem s kalhotami velmi spokojená:)

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Skvělé, pohodlné, velmi dobře vypadající

Kalhoty skvěle sedí, jsou pohodlné, krásně pružné, dole mají zesílenou část která zabraňuje proti oděru. Za mě skvělá volba.

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Lezecké kalhoty SIMOND

Kalhoty používám na turistiku, vycházky, tůry a jsou pružné, lehké, pohodlné. Koupila jsem si ještě jedny do "zásoby". Jsem spokojená.

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Dobré kalhoty

Lehké, pohodlné, dobrá cena. Nyní použito na běžné nošení do přírody. Splnily očekávání.

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Velice pohodlné, strečové kalhoty. Odolné a lehké. Jsem maximálně spokojená.

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Size Guide

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Additional Product Information


Main fabric: 8.0% Spandex, 72.0% Polyamide, 20.0% Polyethylene Terephtalate ; Pocket: 100.0% Polyethylene Terephtalate ; Yoke: 85.0% Polyamide, 15.0% Aramid


- 2 zip hand pockets, accessible when wearing a harness- 1 zip thigh pocket, accessible when wearing a harness- Elasticated waist and removable adjustable belt - Aramid inner lower leg patches for protection from crampon spikes - Gusseted lower leg to fit the pants over mountain boots or ski boots (double fastening: zipper and press stud).


These pants are slim fit; the stretch fabric (8% spandex) with let you move with ease.Product measurements in size S: Waist measurement: 39.4” Crotch length: 32.3”.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual