Product Colors and Sizes

  • Black Friday product
  • New Deal product
  • Cyber Monday product
  • Clearance product
  • Deal product
  • Best Seller product
  • Ecodesign product
  • New product
  • Staff Pick product
  • In The News product
  • Innovation product
  • product

Simond Alpinism 40 + 10 L Mountaineering Backpack

Sale price: $50.00 Regular price: $99.99

Large opening at the back for unrivaled comfort during use. The front pocket gives quick access to mountain safety items.This all-in-one bag is just what you need!

Color: Select a color
Size: Select a size
Sale price: $50.00 Regular price: $99.99

Free shipping over $49

Final Sale: No returns or exchanges

Free returns

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8558677

Product Videos

Product Features

Simond Alpinism 40 + 10 L Mountaineering Backpack | This versatile and modular 40 + 10 liter (2441 + 610 in³) bag is loaded with features. It is the perfect companion for multiday routes or ski touring.

Large opening at the back for unrivaled comfort during use. The front pocket gives quick access to mountain safety items.This all-in-one bag is just what you need!

A photo of the Simond Alpinism 40 + 10 L Mountaineering Backpack in use
A photo of the Simond Alpinism 40 + 10 L Mountaineering Backpack in use


Multifunction: 2 ice-axe loops, helmet carrier, ski/snowboard carrying system

Carrying comfort

Thermoformed foam back, ergonomic straps, comfortable foam hip belt


2.2 lbs fully accessorized and only 2 lbs in its minimalist version.


Save weight: the hip belt's flap and pads are removable.


One-piece 420D Ripstop polyamide construction.

Easy to use

Easy access to bag contents through the zipper opening at the back.

Questions & Answers

Product Customer Reviews

Skip to reviews
122 Reviews
Write a Review 
Simond Alpinism 40 + 10 L Mountaineering Backpack, black Image 16 of 15
Filtered by reviews Loading reviews…
Good but not perfect

After 3 weeks of use in hiking, climbing and mountaineering and after using two other bags, I have an informed opinion and I hope that a product manager will read my opinion ;) On the positive side, the bag is great, well light, well accessorized, large and practical. The portage is good without being excellent (I am 2m tall). Impeccable ice ax holder with blade protection, the strap for hanging the rope is great, quite a few pockets, including the outer one on the front (safety for ski touring) very large On the negative side, the back of the bag tends to deform a little depending on the load and the distribution in the bag, the top of the bag (the flap pocket) tends not to completely fold over the top (if it rains/snow, it can come in interior), it lacks a hose protector on one of the straps and ESPECIALLY, the compartment for the water pocket inside is too small (short) and prevents the use of the small internal zipped pocket. I also already have two holes at the bottom of the outer pocket which fortunately communicates with the main part of the bag (unstitched perhaps). And finally, the elements along the abdominal belt move around a lot and it is not easy once the bag is on the shoulders to "fix" them with the small hook on each side

The mushroom is permanently off the hook

The two handles of the backpack are taken from a non-rigid part of the back, if it is not full the backpack always folds forward, no previous backpack had this system, they were always attached to the rigid part of the back so that they do not fold the backpack

Not very practical

Not very practical

icon-circle-checkmark verified purchase


icon-circle-checkmark verified purchase
Good bag, can be improved

The bag is functional, light and strong, and has a good price/quality ratio for a first mountaineering bag. It still has a few possible improvements: - no side pockets/nets for water bottles/small equipment, that makes it less versatile for short hikes - the hood does not fit well and leaves a gap between its inside edge and the back of the bag when the bag is not full, which can cause water/dust infiltration inside - the belt pocket does not hold well and regularly falls off the strap

icon-circle-checkmark verified purchase
Mountaineering backpack Alpinism 40 + 10 l SIMOND

Mountaineering backpack Alpinism 40 + 10 l SIMOND I did not expect that a week of snowboarding was also good. Compression drawstrings perfectly adjust the size of the backpack to the contents. The zipper in the back of the backpack provides quick access to a change of jersey, a piece of foam to sit on in the snow and other necessary small items. I recommend

icon-circle-checkmark verified purchase
Well made backpack

It fits well and is comfortable. The only flaw is that the abdominal gear holders don't always stay hooked. For the rest fine

A good backpack

The jacket wears well, it is functional, it is versatile.

icon-circle-checkmark verified purchase
Where's the whistle?

Hello, only one complaint, and not the least, why there is no whistle? Amazing! you know, that safety element, the one molded with the chest strap clip! Nevertheless, I'm going to use this bag for a week of ski touring trekking, and it should give me full satisfaction.

icon-circle-checkmark verified purchase
Great product

Light, comfortable, versatile

icon-circle-checkmark verified purchase
Great bag for…

Excellent bag for ski touring or mountaineering raids. Easy to use and many options. Slight loss of comfort with a large load but nothing very negative. Extra point: I also use it on short trips. It goes in carry-on luggage, and the back opening allows for organizational comfort.

icon-circle-checkmark verified purchase
Very good product

Very good product

icon-circle-checkmark verified purchase
the pocket dedicated to…

the pocket dedicated to safety equipment (shovel, probe, knives) is very practical and allows you to separate this equipment from your belongings. tested in ski touring

icon-circle-checkmark verified purchase
Light, capacious and thoughtful

A perfect backpack for someone who is looking for a light and capacious backpack with the possibility of attaching skis, ice axes or snowshoes. The detachable back is a revelation. The carrying system is fine for such a lightweight structure. People who describe problems with the upper flap do not understand the removal of the 3 straps from the back side. After removing them to a minimum, you can wear an empty backpack and the flap holds as it should. I have Deuter backpacks and of course there is a better carrying system, but the weight of the backpack itself times three. If someone is looking for a backpack to go out with 25 kg of luggage, this backpack is not for him. Ultralight but very capacious and well-thought-out backpack.

icon-circle-checkmark verified purchase

On x day trek. A little too massive, but still relatively light backpack. Front pocket for a shovel. Although I have never used the side opening of any backpack, this back opening is addictive :-). Yes, and the same reason + hundreds of extra grams. A relatively sophisticated backpack with a lot of technical gadgets. Although I prefer the more compact 33-liter variant, if I don't pack in it, I take this one :-) For tourists, it won't lack pockets, but it won't get in the way when moving in rocky terrain, and you can even climb with it.

icon-circle-checkmark verified purchase
Skip to reviews

Additional Product Information


Main fabric: 100.0% Polyamide ; Lining: 100.0% Polyamide ; Coating: 100.0% Polyurethane ; Webbing: 90.0% Polypropylene, 10.0% Thermoplastic Polyurethane


- Main compartment = 35 liters + 5 liters with skirt.- Front pocket = 6 liters.- Removable top lid = 4 liters.


- 2 ice-axe loops.- Adjustable front ski loop system and storage compartment.- Side compression straps, can be used to carry skis, sleeping mat, etc. They can also be clipped together at the front of the pack to carry a snowboard or snowshoes.- Hydration pack compatible: hanging hook, drinking tube hole on shoulder strap.- Grab handle.- Gear loop on hip belt.- Mesh helmet carrier.- Elasticated holder in the front pocket for shovel/probe.


- Mesh-lined thermoformed foam back, ensuring good carrying comfort and good breathability.


- Padded and mesh-lined ergonomic adjustable shoulder straps with adjustable load adjuster straps. - Adjustable chest strap. - Padded and mesh-lined ergonomic hip belt for better carrying comfort.- 2 gear loops on shoulder straps.


- A quick-access pocket on the top of the removable top lid, 11.8” x 8.7” with a two-way zipper.- An inner mesh pocket on the inside of the removable top lid, 11.8” x 8.7”, with key hook.- A zipped pocket on the hip belt, 6.7” x 2”.- An inner mesh pocket in the back 8.7” x 7.9”.

Opening system

- The top of the bag fastens with two cord stoppers (one for the main compartment and one for the extension skirt).- Large two-way zipper opening at the back for quick and easy access to the main compartment.- Removable top lid.


- Height: 24.8”- Width: 11.4”- Depth: 9.1”.


- Main fabric: Ripstop 420 denier polyamide / Water-repellent.

Product testing

Designed by our teams in the Chamonix valley, at the foot of Mont Blanc, all of our backpacks are lab tested to guarantee their strength.Our technical partners test them in the field to validate product claims.



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

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual

Please Sign In to Post Your Question

In order to notify you about the answer it is required to Sign In.

Sign In