Trekking Backpack Trek 900 70+10 Liter- Dark Grey



Made for
Backpack combining durability and carrying comfort. Perfect for trekking over one or several weeks. SYMBIUM concept: the most comfortable in the range!
Sizes guide

This product is no longer in stock
Carrying comfortAdjustable back and shoulder straps.
Multiple compartmentsWide front access. 10 pockets + water bladder.
Versatility2 water bottle holders, pole holder rain coverTent holder (straps under the bag)
DurabilityDurable 600 denier polyester fabric. Polyamide-reinforced bag bottom.
VentilationBack with aluminium bars to reduce pressure and allow the back to breathe.
Easy hydrationBack with aluminium bars to reduce pressure and allow the back to breathe.
Weight2.7kg. The weight indicated is that of our benchmark sample.
EcodesignWe dye the yarn with coloured granules to avoid using dye baths
Warranty10 Years
Technical Information

Height : 77cm, Width: 48cm, Depth: 38 cm
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.
Extendable volume: 70 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 %.
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 colour 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 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.
Why are our rain covers grey when some trekkers want them to be brightly coloured?
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 2x15L 1/2 moon storage bags. It's important that you are well equipped for your trek 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
Information / Concept / Technology
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 Foam : 100.0% Ethylene Vinyl Acetate

Our DECATHLON in-store mountain instructors: English, Spanish, Indian, French, German, Dutch, all participated in this product’s design throughout its development process. Join our platform DECATHLON CO-CREATION Discover trekking, hire equipment and check out our products and tips at

Product test
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 trekkers for 5 weeks in the Canary Islands, the Pyrenees and the Mont Blanc mountain range.

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