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Forclaz Men's MT900 50+10 L Ultralight Backpacking Pack

Sale price: $189.00 Regular price:

Thanks to the design choices, FORCLAZ reduced the weight of this bag to just 2.9 lbs without compromising on durability. The bag can be tailored to your needs thanks to the multi-purpose straps.

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Sale price: $189.00 Regular price:

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San Francisco, 735 Market St. Options

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About this item:

  • This backpack is made for multiple days hiking or trekking in autonomy. You can carry everything you need to camp, drink and eat on your back with comfort.
  • The MT900 ULTRALIGHT only weighs 2.9 lb and can contain a total volume of 50 liters which we recommend for a trip under 2 weeks long. The top of the bag is adjustable and can hold an extra 10 liters of volume.
  • This backpack has plenty of features if you are looking for a lightweight technical option at a great price: AIR concept back ventilation, rain cover, water bottle holder, hiking poles holder, 7 pockets and a compartment for a water bladder for easy hydration.
  • The AIR concept: in order for your back to dry faster, we added a mesh on top of a ventilated structure. Ideal for long and sweaty day hikes from one camp to another !
  • This is a men's backpack: This bag has been conceived for a masculine morphology (torso and hips). We recommend to consider the users physical morphology when you choose a bag for comfort purposes when carrying it on your back.
  • 10-year warranty: the fabric of the bag is ultra resistant and Decathlon is proud to offer this warranty for any defect that could appear in the next 10 years.
Model: 8642599

Product Videos

Product Features

Forclaz Men's MT900 50+10 L Ultralight Backpacking Pack | FORCLAZ designed this ultralight & robust bag for demanding users looking for performanceIdeal for completing 2 stages of a long-distance hiking trail in 1 day.

Thanks to the design choices, FORCLAZ reduced the weight of this bag to just 2.9 lbs without compromising on durability. The bag can be tailored to your needs thanks to the multi-purpose straps.

A photo of the Forclaz Men's MT900 50+10 L Ultralight Backpacking Pack in use
A photo of the Forclaz Men's MT900 50+10 L Ultralight Backpacking Pack in use

Carrying comfort

Carrying up to 12kg, suitable for men. Ventilated back, adjustable height

Multiple compartments

Full height access to the central section, 7pockets (cent.sect:3, lid:2, belt:2


Pole holder, rain cover, side pockets which can be accessed when walking

Abrasion resistant

Main fabric in 100D RS polyamide, reinforced bag bottom (210D RS)


Reinforced frame with mesh reducing pressure and letting the back breathe.

Easy hydration

Internal compartment for a water bladder (not included)


1.3 kg. The empty weight indicated is that of our benchmark sample

Questions & Answers

Look for product information, frequently asked questions, opinions...


Does it come in orange? Weight capacity?


This backpack has only one color option. We do not provide a weight capacity promise, however we offer a 10-year warranty: the fabric of the bag is ultra resistant and Decathlon is proud to offer this warranty for any defect that could appear in the next 10 years.

By Uluç on Oct 30, 2023 | STAFF

Product Customer Reviews

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79 Reviews
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Squeaky backpack

I purchased this backpack recently in anticipation of multi-day hikes this summer. I had read all the reviews and despite a lot of negative reviews took the risk of this purchase, having few possibilities to try on this type of bag around me. BAD SURPRISE: from the first day of testing with a bag loaded with 8kg, I heard the squeaking noise mentioned by several users. This seems to come from the base of the frame. I can do other tests but I doubt it will change anything... And this squeaking can quickly become unbearable as has already happened to me with a shoe! Is there a solution to correct this defect? Can I return the bag and get a refund?

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Tested on a weekly march (min. 30 km every day) and on several shorter trips. The backpack fits very well and the pockets are placed in such a way that even the side pockets can be easily reached while walking, e.g. for water. On the body of the backpack and on the lid, there are several options for attaching a small carabiner, and the lower straps for hanging, for example, mats, are also well designed. Side opening is excellent. Overall, you can see that someone put a lot of effort into designing this backpack and thought about the needs of the users, and the workmanship is also good. With its weight, it is not one of the lightest in the UltraLight category, but it is amply compensated by a lot of small gadgets and, of course, the purchase price.

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No complaints

No complaints

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A light, well-made backpack

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I return to the review. The first impression was good, but after a 3 day shift it changed. Uphill or flat it's ok - ish. The problem with the backpack appeared on the way down. Every 2-3 steps it would slide down on my hip as I tightened the strap and adjusted the length of the back. The frame of the backpack ended up pressing on the hip, causing immense discomfort. Shame, the materials seem good, the side pockets are great, so is the zip access, the straps under the rucksack are brilliant.

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Very light and comfortable backpack. The side pockets are a great idea, I carry water bottles in them, which are easily accessible even without removing the backpack.

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MT900 bag

Lightweight and very easy to adjust. The color is also very nice.

A very light bag

Strong points: - Light - Solid - Comfortable and easily adjustable Weak points: - Price - The compartments on the sides do not close

Great, relatively light, comfortable

This is the perfect comfort to weight ratio backpack I've ever tried. The new class of ultralight backpacks are just not very comfortable. I do wish they had a 40l or 50l option.

Need a larger size

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With this backpack I followed Francesco's path crossing the Apennines between Tuscany and Umbria... super satisfied. It met all my needs, in some cases I loaded it well over 14 kg without any problems.



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ultralight backpack

Modern, very practical products

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Additional Product Information


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


Bag dimensions when in use: Height : 65 cm / 26 in Width: 35cm / 14 inDepth: 35 Cm/14 inTorso length (= distance 7th vertebrate - ilium): Minimum: 39 Cm/15 in Maximum: 51 Cm/20 in The waistband:Minimum: 74 Cm/29 in Maximum: 144 cm / 57 in


1.3 kg All inclusive. Weight of the removable rain cover 100g.Weight of the removable lid 100g.i.e. 1.1 kg in simple mode!

Air design

Inspired by its sister, the MT500 AIR, this bag replicates many of the features of its ventilated back structure with a mesh fabric so that the back can breathe more and dry quickly.


50 L volume +10 L extension. 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 %.

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 to hand. Place small items for daily use (sun cream, map, glasses etc.) in the pockets. The water bladder can be placed in the compartment provided down the back.

How to use the multi-use straps?

The new MT500 AIR and MT900 UL series of trekking backpacks have two straps with open aluminium buckles (on the lower part of the bag). These straps let you hook on a tent or mattress under the bag or on the barrel. If not in use, these straps can be stored (by pushing them inside) in the hidden pocket intended for this or detached and used elsewhere with the lark's head knot buckle.

Complementary accessories

To make your MT900 UL bag easier to use, check out our storage accessories, repair buckles or hanging straps on our website.

Recommended carry weight

According to the project for which this backpack was designed, we recommend you don’t load it above 12 kg. Then you can benefit from all its features. Moreover, it’s not recommended to carry a load greater than 20-25% of your own weight and put too much pressure on your back.


Main fabric in 100D RS polyamide (ripstop = additional resistance to tearing), reinforced bag bottom (210D RS)

Product testing

All our backpacks are field-tested by users who represent the target market in conditions identical to those found in typical use. In particular, our Test Missions bring together the product manager with people who are not affiliated with DECATHLON to test, improve and validate the products. This particular model was tested over a five-week period by trekkers in the Canaries, Pyrenees and the Mont-Blanc mountain range.

Storage instructions

Store your bag in a dry, ventilated place away from direct light.




Size Guide Visual

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