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Forclaz Men's MT900 Symbium 90+10 L Backpacking Pack

Sale price: $249.00 Regular price:

This backpack, combining resistance and carrying comfort, has undergone 188 laboratory tests and been tested for more than 280 hours on the ground. Its Symbium concept is the most comfortable of the range.

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Sale price: $249.00 Regular price:

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About this item:

  • Dimensions: Height: 27.6” Width: 15.7”, Depth: 13.8”
  • Carrying comfort: Perfect for men carrying up to 33 lbs. Ventilated back with adjustable height
  • Weight: 3.9 lbs
  • Multiple compartments: Split capacity, wide front access, access to bottom of bag. 8 x Pockets
  • Ventilation: Reinforced frame with mesh reducing pressure and letting the back breathe.
  • Polyamide main fabric 210D RS (Ripstop = increased resistance to tears), reinforced bag base (420Dx330D RS)
Model: 8676380

Product Videos

Product Features

Forclaz Men's MT900 Symbium 90+10 L Backpacking Pack | Robust and large volume backpack (90 L + 10 L extension). Designed for men and for mountain expeditions lasting several days to several weeks.

This backpack, combining resistance and carrying comfort, has undergone 188 laboratory tests and been tested for more than 280 hours on the ground. Its Symbium concept is the most comfortable of the range.

A photo of the Forclaz Men's MT900 Symbium 90+10 L Backpacking Pack in use

Carrying comfort

Adjustable back and shoulder straps. SYMBIUM technology

Multiple compartments

Wide front access. 10 pockets. Water bladder


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


600 denier durable polyester fabric, reinforced polyamide bag base


Back with aluminium bars reducing the pressure and allowing the back to breathe

Easy hydration

Internal compartment for water pouch(water pouch not included)


6.13 lbs (2.8 kg). The empty weight indicated is that of our benchmark sample

Questions & Answers

Product Customer Reviews

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204 Reviews
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Best rucksuck but price very high

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The product is very good

The product is very good, but the shipping takes a little longer

Well thought out backpack but crippling defect.

I have just tested this backpack on an 8-day trek in autonomy, which is the program for this bag. The design is very good in terms of accessibility, number of storage spaces, settings. Obviously for this price which seems very good in this range, the weak point will be at the level of the weight. This type of 90 liter backpack is obviously dedicated to trekking and long independent expeditions. This implies a heavy load of the order of 30kg to 50kg. I read on a label of the bag "designed and tested in Chamonix France" I find it hard to believe that this bag has been tested in the conditions for which it is supposed to have been designed, i.e. carrying heavy loads over long distances. The design flaw is in the belt. The circumference of the belt is too short and the padding much too weak. When you carry for example 30kg, which is very often the case in a 90 liter bag, you carry 2/3 on the hips and therefore on the waist belt. The padded part happens to be very short and very thin, and you very quickly find yourself with the strap tension adjustment ring, in direct contact with the upper thigh when you climb. The rest of the waist belt made up of webbing cuts your stomach during exercise. I'm 173cm tall and 77kg, I dare not imagine a large size of 185cm for 90kg with this bag!: the padded part will then reach him at the tip of the hips and the strap all along the belly, exerting a shearing force on his body equal to 2/3 of the weight of the bag. In short, I am very disappointed. After buying this product with confidence for €170, I don't know what to do with it. I looked at the belt in detail: it is not possible to replace it with another of better quality because it takes up the rigidity of the bag by the two aluminum plates integrated into the bag... I can provide you with the photos taking on me the position of the belt and the adjustment buckles. A photo is often better than a long speech.

Barak on the go

I've had Krosna for the third year now and I'm absolutely satisfied. The amount of adjustment of the straps, back and shoulders is endless and thanks to this it really fits everyone. Well padded and padded. The ability to open the entire front side is very useful, so that you can reach even the lowest places, and I consider the ventilation of the back to be a big advantage.

I went to…

I went to decat so that he could adjust the backpack for my morphology but the result was not convincing, I had burns on my hips, it should be noted that I had 20 kilos to carry the problem with this bag, is that you can take a lot of extra stuff

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useful backpack

big and easy to use

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I'm just writing the comment, but I've been using the bag for about 8-10 camps. Except for the price, it doesn't have much of a problem, I think the most important thing to consider is the bag and tent. I'll pass this bag alone, take it and hang out

A reliable worker

I've had the backpack for four years now. I use it at the military level, so heavy loads, rough handling and demanding terrain, and the backpack is still as good as new in terms of functionality. All straps, buckles and elastics still hold. In terms of practicality, the backpack does not have many small pockets, organizers from the Decathlon offer can help. A large pocket with a front zip opening and in combination with the organizers offers maximum accessibility while maintaining the distribution of the load. I recommend all ten!

My adventure companion

Left alone for 250 km, this bag is almost perfect, both in terms of volume and ergonomics. Two things maybe to improve: the belt pockets are a bit small and the zipper. not very practical. The abdominal belt can quickly become injurious to the hips when carrying heavy loads (20 kg). The honeycomb fabric and the density of the foam may need to be reviewed.

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Very good bag just...

Very good bag just a pity we can not close with a padlock

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I recommend!

I switched to it from the Wisport Reindeer 75l backpack, I will say this is a completely different level, a very well-thought-out and comfortable backpack, a lot of adjustment, extra space for water bottles, opening system and comfort when traveling 20-30 km a day, no discomfort, for me (192cm 105kg) is just perfect.

Practical trekking bag


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Unfortunately too high for me

Beautiful bag and given my experiences with a previous Forclaz I would have liked to have kept it. Unfortunately, it turns out that the back plate on the front of the bag is too long for me. When I adjust the shoulder straps to my back length (M), this plate appears to tap against the back of my head and I can no longer look up. Nogo in the mountains I'm afraid.

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A real BIG bag.…

A real BIG bag. Bought for a long trip, in addition to a suitcase. It is very easy to wear. Things fit easily in there. I cannot give an opinion for the hike but its comfort must certainly be an asset.

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The place where the top bag and the main body are connected has been dragged

At the beginning, I bought this top for the whole section of Batong Pass and Mountain Crossing. Later, I would also carry it when I took children climbing mountains. But the inner waterproof coating is still cracked.

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Additional Product Information


Main fabric: 100.0% Polyester ; Lining: 100.0% Polyester ; Yoke: 100.0% Polyamide ; Webbing: 100.0% Polypropylene ; Bag cover: 100.0% Polyester ; Coating: 100.0% Polyurethane


34.65” x 21.26” x 16.93” (88 cm x 54 cm x 43 cm)


Extendable volume: 90 L + 10 L extension thanks to the bag’s top flap with adjustable height. The volume of each backpack is measured using a standardised 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 litres, with a margin of error of just a few %.

Bag construction

The assembly of the different parts of this bag has been proven to withstand high tension levels, especially when it is filled or handled.Each element has been designed to guarantee the reliability of the construction: thick front zip (10mm), reinforced seams at the base of the skirt and on the straps.

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 trekker's movements when walking. No more balancing effects that tire out the trekker thanks to the SYMBIUM system.

How to pack a backpack?

Place your sleeping equipment at the bottom of your backpack. Position your water bag in the compartment provided for this purpose. In the back, place the heavy equipment (tent, stove, food) and position your clothes around it. Your tent or groundsheet can also be placed under the flap or under the bag. Keep your waterproof jacket and/or fleece within arm’s reach. Place small items for daily use (sun cream, map, glasses etc.) in the pockets...)

Timeless styling

We have selected pigment colours and used clean lines for a timeless style that will be passed down from generation to generation.

Dying process

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

Why are our rain covers grey?

The grey colour is neutral so uses less dye. We also use a “bi-ton” dyeing process where only one thread in every two is dyed. This dyed yarn is also made from a bulk dyeing process which incorporates the colour pigments from the yarn manufacturing phase onwards. Forclaz is committed to improving the environmental impact of its products through these actions.

Complementary accessories

Compatible with 15L half-moon storage bags.

Product testing

Several laboratory tests have been carried out to test the resistance of the MT900 Symbium backpack. We have therefore achieved: a Martindale test which evaluates the abrasion resistance of this backpack, an initiated tear test (seams), a fatigue test on the compression of the foams, a test of resistance to rigidity and bending of the aluminium structure (located at the back of the bag).

Storage instructions

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



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.

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  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

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    Minimal retail footprint

    lowers overhead and indirect costs


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