Free Delivery over £30* | Free Click & Collect at Decathlon Stores | 365 Days to Return
Reference : 8559698
Add to my wish list
Product already added

FORCLAZ Men's mountain trekking rucksack | TREK 100 Easyfit 90L - blue

was £74.99 -%


This price includes a recycling fee for electrical equipment and batteries DecathlonDeeeTaxMentionAfterPrice / Since

From To

* Sales from to Until end of stock
* From and limited stock
£74.99 -%
This price includes a recycling fee for electrical equipment and batteries DecathlonDeeeTaxMentionAfterPrice / Since

* From To

* Sales from to Until end of stock
* From and limited stock
Check availability in store
Our passionate trekking team has designed this easy-to-adjust 90L bag for men setting off to the mountains for a few days and looking for comfort and simplicity Co-designed with users in the French Alps, this bag offers simplicity and comfort without giving up its technical features. An eco-designed bag with its mass-dyed polyester and recycled buckles.

Product benefits

Durability 600 denier polyester main fabric
Polyamide base of bag
10-year warranty
Carrying comfort Carry system for the male body shape. EASYFIT automatic back adjustment.
Multiple compartments Internal compartments
Front access from below
5 pockets
Water pouch storage
Versatility Water bottle holder
Pole holder
Rain cover
Ventilation Back with aluminium bars reducing the pressure and allowing the back to breathe
Eco-design Dope dyed polyester fabric and recycled plastic buckles
Easy hydration Internal compartment for a water bladder (not included)
Discover your product in action

Technical Information


Volume of 90 litres.
The volume of each backpack is measured using a standardised method: we fill the main compartment as well as each pocket with little balls.
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 %.


2.1 kg
The empty weight shown is that of our reference sample.
There may be slight variations.


Height: 70cm,
Width: 30cm,
Depth: 30cm
Compatible with 2x15L 1/2 moon storage bags

EASYFIT system

Our patented Easyfit system allows you to adjust the back height and strap tension simultaneously by pulling on one single strap (on each side).
1. Put on your bag
2. Buckle and tighten the belt
3. Pull the straps (from top to bottom)
You're ready to go!

How to pack a backpack?

Put your bedding at the bottom. Near your back, place heavy equipment (tent, stove, food). Pack your clothes around these items. A ground sheet or tent mat can be placed under the flap or the bag (add straps) if they cannot be fitted inside. Keep a waterproof jacket and fleece to hand. In the pockets, place small items for the day (sunscreen, map, glasses...). The water bladder can be placed in the compartment generally provided down the back

Why are our rain covers grey when some trekkers want them to be brightly coloured?

The grey colour is neutral and therefore uses less dye.
The component is made of BITON: this process allows us to lower our CO2 impact and reduce consumption and water pollution in comparison to coloured models.
These small measures demonstrate the commitment of Forclaz to improve the environmental impact of its products.

10-year warranty

Our engineers have conducted tests simulating the ageing of rucksacks. These tests are conducted on the components, seams and finished product. The results enable Forclaz to guarantee the tested bags for 10 years from the purchase date shown on the receipt

Complementary accessories

Check out our storage accessories that facilitate the use of the TREK 100 bag here:


2.1 kg

See more See less

Composition / advice

Main fabric
100.00% Polyester
100.00% Polyester
100.00% Polyester
100.00% Polypropylene
Bag cover
100.00% Polyester
100.00% Polyurethane
Washing instructions
Hand wash
Hand wash
Do not bleach
Do not bleach
Do not tumble dry
Do not tumble dry
Do not iron
Do not iron
Do not dry-clean
Do not dry-clean
Stock advice Store your bag in a dry, ventilated place away from direct light.
Legal notice Discover trekking with FORCLAZ at
How to use your product

Our commitments

Our passionate customers recruited through our DECATHLON Creation test platform: Contact us at
Test Product All our backpacks are tested in use in the field by target users under the same conditions as they would experience in real-life 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 specific model was approved by trekkers spending 5 weeks in the Canaries, the Pyrenees and the Mont Blanc mountain range.
Guarantee : 10 Years

Your reviews

Reviews by our Team Members