Product Colors and Sizes

Special product, Innovation Special product, New Release Special product, Special product, Sale

Mountaineering Backpack 40 + 10 Liters - Alpinism 40+10

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

Free returns

Free shipping over $30

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8558677

Product Features

Mountaineering Backpack 40 + 10 Liters - Alpinism 40+10 is designed for

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 Mountaineering Backpack 40 + 10 Liters - Alpinism 40+10 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.

Product Customer Reviews

Skip to reviews
3 Reviews
Write a Review 

Mountaineering Backpack 40 + 10 Liters - Alpinism 40+10,black
Filtered by reviews Loading reviews…
Functional design but can be improved

I like the zipper opening at the back. it works like a travel backpack. I also like the flexibility of add on and off some parts. However, I dont understand those cheaper version also used a more durable frabic at the bottom and back, why that does not appear in this more expensive backpack.

Mauvaise conception

Le rabat supérieur ne tiens pas en place, il tombe sur l'avant du sac. Même en serrant au max les sangles prévues. L'eau peu ainsi pénétrer, la répartition du poids est affectée, ... Il devrait y avoir un soufflet pour le retenir et l’empêcher de tomber sur l'avant et peut être un zip sur ce soufflet (pour le côté amovible). Dommage appart ça il était top Néanmoins j'aimerais en faire retour.

Bonjour Nicolas,

Je vous remercie d'avoir pris le temps de nous laisser votre avis sur notre sac à dos d'alpinisme 40+10 litres.

Les retours de nos utilisateurs sont précieux pour nous permettre d'améliorer nos produits. Ainsi nous prenons note de vos suggestions afin de perfectionner ce sac et nos futurs modèles.

Bien entendu si vous le souhaitez vous pouvez vous rendre en magasin afin d'échanger ce modèle ou procéder à son remboursement.

Attention, compte-tenu des circonstances actuelles, prenez connaissance des conditions d'accès à nos magasins sur notre site internet:

Je vous remercie de votre fidélité et vous souhaite une agréable journée.

SANDRINE, passionnée de sport

Très bien, fait le job

Première sortie ski de rando avec ce sac ce WE. Nickel / Rien à signaler. Principal intérêt de ce sac : son poids, presque 1kg de moins que mon précédent sac (grande marque, même capacité) ...

Additional Product Information


Main fabric

  • 100% Polyamide


  • 100% Polyamide


  • 10% Thermoplastic polyurethane
  • 90% Polyester cationic


- 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