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MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's

Sale price: $209.00 Regular price:

A backpack that is durable and lightweight with a carry system that is comfortable for long expedition-type hikes lasting several weeks. The Symbium concept: The most comfortable in the range.

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Sale price: $209.00 Regular price:

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Model: 8492336

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Product Features

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's | We developed this sturdy and generously sized 70 L bag (+ 10 L extendable) for traveling autonomously for several days.

A backpack that is durable and lightweight with a carry system that is comfortable for long expedition-type hikes lasting several weeks. The Symbium concept: The most comfortable in the range.

A photo of the MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's in use

Carrying Comfort

Adjustable back and shoulder straps.

Multiple Compartments

Wide front access. 10 pockets + water bladder.


2 water bottle holders, pole holder rain cover, tent holder(straps under the bag)


Durable 600 denier polyester fabric. Polyamide-reinforced bag bottom.


Back with aluminum bars to reduce pressure and allow the back to breathe.

Easy Hydration

Back with aluminum bars to reduce pressure and allow the back to breathe.


6 lbs. The weight indicated is that of our benchmark sample.


We dye the thread with colored granules to avoid using dye baths

Product Lifestyle Image Gallery

Image Gallery

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray 

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray 

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray 

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray 

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray 

MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray

Product Customer Reviews

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MT900 Symbium, Backpacking 70 + 10 L Backpack, Men's,carbon gray
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Unbelievable value

Really well designed with so many features for the cheap price.

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good value

Works well and can take a lot of stuff

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Great back pack for hiking

Good materials quality design Not a single loose stitch

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Hiking / trekking pack

9 massive pockets so lots of room for everything. adjustable everything like every strap etc. Hydration capable. Pack cover included good for three days plus in the wilderness.

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so much space! great versatility! Wow!

Bought this for a multiday tramp in the mountains overseas followed by tour around some towns. As a tall woman、 I found no problems carrying this around and it gave me bonus room compared to the women's model. The adjustment straps、 especially the belt ones were thoughtfully layed out and easy to tighten and loosen. A great feature is the detachable top that can be converted into a shoulder bag if you want to dump the rest of your gear at camp or in a hotel and explore carrying valuables etc only (in mine i fit a dslr、 a kindle、 a book and a nintendo). The interior pouch is perfect for camelback hydration bladder. The side pockets are brilliant and tough and there are smaller pockets on the waist belt! I was able to carry camping equipment、sleeping bag some clothes and had space to fit in sizable souvineers too!

Great bag!

Great bag!

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Hello Brad,

Thank you very much for leaving a review about this bag!

Really happy to hear that you are enjoying it.

Have a great day and see you again very soon.

Decathlon Calgary Team

Heavy but heavy duty

At 2.7kg this is not a light pack but with the strong frame, it can carry a fair amount of weight comfortably. While it's a stiff pack, there's a pivot point at the lower back meaning to how some mobility. The fabric is tough stuff and i man really tough. It's had a fair amount of stuffs on sharp rock and it'd fine. I've accidently dropped my knife on the bag point down and it was fine (yes silly mistake). This pack is ideal for winter solo trips where you might be carrying more gear. I do photography as a profession so I like my equipment to be both protected and easily accessible. With the front double zip you can access the whole volume of the pack, which is rather convenient. There's a reasonable amount of adjustments to get that pack set up right. Also plenty of pockets for bit and bobs. There's suspension in the shoulder straps which really helps reduce the shock loading on you body (nice detail). Some on the negatives are the weight and size. While good for winter expeditions, I would look at a smaller and lighter pack and just carry less stuff if walking in the summer months. It'll be more enjoyable. While it's nice there's to bottle pouches, they can be a bit difficult to use. Overall, really good pack but not one I use all the time

Excellent backpack

15 y.o. daughter is using this for Ten Tors and DoE training and events. Absolutely crammed with spare clothes, food, sleeping bag, sleeping mat, first aid kit, cooking kit, tent etc.. I can barely lift it and she happily hikes all day wearing it. Excellent adjustable back system. Extra marks for the 2 really practical 1L water bottle pockets that are easily accessible without removing pack and for the integral rain cover. Despite hard use, still looks new.

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Great design

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We bought this backpack a couple of years ago for our son (180cm) for DoE and worked well. This month our daughter had a school trip to an adventure place. She is only 160cm height, and this is a backpack for men but thanks to the good adjustment system, we moved the straps into XS and it worked! She was almost invisible from back but she could comfortably walk. There are endless pockets and straps, good opening system for the main compartment, removable top which becomes a bag, we are vary happy with this backpack, I am impressed with Dacathlon. Thank you!

Low quality

Zipper broken after few weeks

Perfect back pack. Ill explain some missing detail

Bought this to replace a cheap '65 + 5L' backpack from Amazon. Always knew it was not 70L. Bought this (70+10) over the 90+10 thank god I did, its a big old backpack. but This is the perfect backpack, it literally has all the bells and whistles. Yet to test out and about but I have fully loaded it so I will explain below. In the top you have your pouch for rain cover, theres room in there for your rain jacket also, on the underside of the lid there is another zip pocket, so first aid kit, headlamp etc in there. Also in there is a zipped mesh pouch for phone wallet and a clip for keys. The 2 water bottle holders is perfect without removing other handy features such as 2 pockets on waist belt. Waist belt is thick and sturdy and does not dig in. Plenty of adjustment for shoulder width, height, waist and chest. Main compartment is absolutely huge. With everything I need in there for a hike in comfort which doesnt fit in most medium sized bags there is plenty of room upwards If I needed it. So main compartment has large synthetic sleeping bag, tent, clothes, poles and pegs, food sack, frying pan, sleeping mat, hydration bladder and stove set. jacket, waterproof trousers. Tarp, rope, fold out chair. Main side pockets quick access stuff like toiletries, spade, snacks, light, multitool etc Then still 2 mesh pockets with straps spare for light camp trainers or extra poles, and also trekking pole holders to the side. Foam sleeping mat underneath the bag. Few things hanging off the front tabs. All this comes in at around 12KG and when i set it up on my back correctly I literally did not feel any heavier. Was abit dubious about a framed backpack for the extra weight but it is true, when something fits properly you can definitely carry more. Really looking forward to taking this out. Cannot recommend enough for (initial) comfort and storage and how well thought out it is. If anything changes when I can take it out I will be sure to update



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Good bag, but The paddling in The belt are really cheap and poor. Thinking about return The bag beacause of The paddling, so bad.

Best Bag I've Bought

Extremely comfortable with lots of options to spread loading when carrying heavy. Ability to adjust the height of the shoulder straps is great as I'm quite tall. straps on the bottom are a good addition to carry a tent or something large on the outside of the bag, with the waterproof cover able to cover this aswell. Space inside is huge with a great amount of extra pockets and the zip to open the front makes everything in your bag accessible without having to drag the whole lot out of the top. Pockets for waterbottle being tilted is a great ergonomic feature, making it easy to access.

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Size Guide

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Additional Product Information


Main fabric

  • 100% Polyester cationic


  • 100% Polyester cationic


  • 100% Polyamide


  • 100% Polypropylene

bag cover

  • 100% Polyester cationic


  • 100% Polyurethane


  • 100% Ethylene vinyl acetate


Height: 30.3", Width: 18.9", Depth: 15"

Symbium technology

The comfort of a backpack lies in its good balance when walking. Symbium technology consists of a jointed waistband that allows the backpack to adapt to the backpacker's movements when walking. The Symbium system means no more balancing effects that tire out the backpacker.


Extendable volume: 70 L + 10 L (4271.7 in³ + 610.2 in³) extension via the bag’s top flap with adjustable height. The volume of each backpack is measured using a standardized method. we use small balls to fill the main compartment as well as each pocket. The balls are then emptied into a graduated container in order to determine the equivalent volume in liters, with a margin of error of just a few %.

Dying process

Textile dyeing requires a lot of water but also produces waste water from the dye baths. To reduce this environmental impact, we have opted for mass pigmentation called "dope dye" integrating the color pigments from the initial thread manufacture. This process reduces this backpack’s CO2 emissions by 30% compared to the previous model.

How to pack a backpack

Put your bedding at the bottom. Put heavy gear (tent, camp stove, food) near your back. Store your clothing around it. A groundsheet or tent can be placed under the flap or under the bag if there isn't room inside. Keep your waterproof jacket and fleece at hand. Place small items for daily use (sunblock, map, glasses, etc.) in the pockets. The water bladder can be placed in the compartment provided down the back.

Why are our rain covers gray when some backpackers want them to be brightly colored?

The gray color is neutral, so it uses less dye. We also use a “bi-ton” dyeing process where only 1 thread in every 2 is dyed. This dyed yarn is also made from a bulk dyeing process that incorporates the color pigments from the yarn manufacturing phase onward. Forclaz is committed to improving the environmental impact of its products through these actions.

Complementary accessories

Compatible with 2 x 15 L 1/2-moon storage bags. It's important that you are well equipped for your hike to take place in the best conditions. So to complete your equipment and make your MT900 backpack easy to use, check out our storage accessories



Product testing

All our backpacks undergo field tests by users who are representative of our target market under similar conditions to those you will encounter. To test, assess, and validate products, our mission test connects the product manager responsible for the product design with individuals independent to Decathlon. This backpack was tested by backpackers for 5 weeks in the Canary Islands, the Pyrenees, and the Mont Blanc mountain range.

Storage instructions

Store your bag in a dry and ventilated place, out of the sun.

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