Forclaz 400 Men's Hiking Waterproof Rain jacket - black



Made for mountain hikers who want protection from the rain and wind, with excellent freedom of movement.
Extra stretch for freer movement. A waterproof, breathable, ventilated and stretch jacket at a competitive price. Sturdy and reassuring with its 3-layer component - it will accompany you everywhere.
Sizes guide

Waterproof3-layer membrane stretch fabric (10 000 mm). Seams and zips 100% waterproof.
BreathabilityHydrophilic membrane (RET=6): limits condensation inside the garment.
VentilationUnderarm ventilation zips: facilitate moisture transfer.
Freedom of movementStretch fabric that is extremely comfortable to wear. 13% elastane.
LightweightWeight: 590g in size L.
PocketsThree secure pockets: one breast pocket. 2 mesh pockets inside.
Environmental impactLife cycle comparison: Men's waterproof jacket -
Warranty2 Years
Technical Information

Sizing information
Fitted cut to fully benefit from the stretch component. The jacket's inner volume allows you to wear it over a thin light second layer such as a light down or fleece garment.
Attached. Height and depth adjustable with elastic drawcords and toggles. Stiff visor for maximum face protection.
2 hand pockets with waterproof zips + 1 outer breast pocket with a waterproof zip + 1 easy-access inner mesh pocket.
Jacket hem drawcord
Elastic draw-cords and toggles.
Adjustable cuffs
With rip-tabs.
Main component
3-layer stretch coated fabric.
Additional recommended products
Forclaz Rain overtrousers protect the lower half of your body, as part of a complete and effective rain protection system for your mountain outings. Care products: spray or liquid water repellent treatment in the washing machine. To boost fabric water-repellency and optimise your garment performance throughout its life.
Waterproof component
We measure a fabric's resistance to a column of water in mm (based on the ISO 811 standard). The higher the water pressure withstood, the more waterproof the fabric. A component with 2000mm waterproofing can withstand the pressure of 2000 mm water (corresponding to about a hour of rain).
Waterproof garment
Technologies: this garment has been subjected to a shower test using 100 litres of water/sqm/hour for 3 hours. This test reproduces the conditions of a violent storm in the mountains.
Component breathability
To find out whether a fabric is breathable, we test its evaporative resistance or RET (based on the ISO 11092 standard). The lower the fabric's resistance, the more water vapour generated by physical activity evaporates, and the higher the fabric's breathability. For example: RET < 9 = extremely breathable fabric / 9
Garment breathability
In addition to breathable fabrics, Quechua develops technical solutions (zips, ventilation, mesh, etc.) to improve the overall ventilation of its trekking jackets and overtrousers (Forclaz, Bionnassay and Helium lines). These ventilation systems allow you to regulate the temperature inside the garment and also to facilitate the transfer of perspiration generated by the body during physical effort.
Component with coating or a membrane
Coating: like a layer of "paint" applied on the underside of the fabric to make it waterproof while remaining breathable. It is often less costly than a membrane, and requires a lining for protection.The membrane: is like a very fine plastic film (polyurethane) making the component waterproof while remaining breathable. It has the edge, being more supple, lightweight, durable and often more breathable than coating.
3-, 2- or 2.5-layer component
"3 layers": the membrane is bonded to an inner and outer layer of the component. This construction helps the membrane last longer and boosts the component's performance. "2 layers": the membrane is only bonded to the outer layer, the inner protective lining is "free". This construction costs less but is generally more cumbersome. "2.5 layers": the membrane has inner protection with a kind of varnish coating rather than an actual layer to make it as lightweight as possible.
Water repellent component
A fabric is water repellent when it allows water slide over its surface without seeping in. This prevents the fabric from swelling, and keeps it lightweight, breathable and warm. The fabric is made water repellent by treating its outer surface. This treatment must be renewed throughout the garment's lifetime (recommended after every three washes). All the Quechua waterproof jackets have received a water-repellent treatment.
A score for comparing products' environmental impact
The product's environmental impact is calculated across its entire life cycle using different indicators. An overall ABCDE score is attributed to help you more readily identify the products with the best environmental performance by comparing the same type of product (T-shirts, trousers, backpacks, etc.). Decathlon is committed to visually displaying environmental information. For more information visit:
Weight630 g in size L.



Information / Concept / Technology
Main fabric : 87.0% Polyamide (PA), 13.0% Elastane Lining : 74.0% Polyester (PES), 26.0% Elastane

Product test
Quechua is based at the foot of Mont Blanc, in Haute-Savoie (France). All year round, our design teams create and develop products that are appealing, simple, and technologically advanced. These are then ruthlessly tested in the field in collaboration with our technical partners and mountain professionals. We remain convinced that only through rigorous testing under real world conditions, like the ones you will be using them in, can we continue to provide you with better products than ever.

Stockage tips
Always make sure that this waterproof protective garment is completely dry before storing it.

Maintenance tips
Wash at 30°C. Use liquid detergent, do not add fabric conditioner. Fasten zips and rip-tabs before washing. With each wash, renew the fabric's water repellent properties using a suitable treatment. A comprehensive range of products specially designed to maintain waterproof yet breathable fabrics is available in all Decathlon stores. These products will help you optimise your garment's performance throughout its lifespan.


Sort by:
quality of jacket
Used for 2 to 8 weeks
upto what temperature it can handle?
Response of the brand
Hello Nikhilesh Nayak,

Thanks for your feedback on the Forclaz 400 rain jacket.

The Forclaz 400 rain jacket is a hard shell or the outer most jacket a user wears when he is on the mountains. It does not provide any warmth, the usage of this jacket is to protect a person from rain and wind, the fabric is 10000 mm waterproof when tested in the water column test generally used to test the waterproofing of a fabric. It is also a stretch fabric which enables more comfort when a user wears it.

It would be great if you could let me know your usage so that I can suggest you the right product according to your requirement,

Sandeep NAIR
Size short
Just received my jacket from decathlon, but it's just one size short, pls help
Response of the brand
Hello Syed Ibrahim,

Thanks for writing to us.

You can take the jacket to any of our store closer to you and get it exchanged for the size you require.
Or you could write a mail to and our team will get in touch with you and pick the product at your doorstep according to your convenience and then provide you with the size you require.

I stay available if you need any further assistance.

Sandeep NAIR
Bad build quality
Used for More than 1 year
The seams started to come apart after a couple of wears. I exchanged my jacket for a new one and the same thing happened with the new one too. Not sure what to do now. I wear the jacket under my motorcycle riding gear so there can't be a lot of pressure applied to the rain jacket itself.
Keeps you dry for light to medium showers
The seams give away after a few wears
Response of the brand
Thanks for the valuable feedback. We are extremely sorry to hear the problems you faced with the jacket. We believe that this is a product defect due to the incorrect application of the seam tape. We have identified the batch and have started to recall all the jackets. We would gladly provide you with a replacement(which is of better quality and a higher level of waterproofing- 10,000mm) or a refund. This is the Jacket represented on the page, the only difference with aesthetics is that the new one has Orange coloured Zippers & a double Zipper. Once again we are sorry for the inconvenience caused and hope that you would continue being a loyal customer. 

Aniketh Premanath
E-sport manager DECATHLON
Ogden found this answer helpful
Compact and waterproof
Used for 3 to 6 months
Bought this for a trip to the north of Scotland as needed a very waterproof jacket, glad to say the water just ran off this even after 4 hours in continuous heavy rain and a back pack on. it was surprisingly breathable also and hopefully come the winter, i can put it over my main warm jacket.
Waterproof, compact, flexible
great looking, leaks during down pours
Used for More than 1 year
I bought this jacket Aug 2014. I have been using it only to walk too and from work which is around 10mins each way. Never really had an issue as i was only out in the rain for a short time. Having said this, I never really used it under heavy sustained rain. in the last couple of weeks i have been taking my daughter to cross country meets, one particular weekend there a was a heavy down pour and thought this was great time to test the jacket out. At the end of the day, items I had in my pocket were wet, my tee shirt covering my shoulders, chest and back were soaking under the jacket. I have always been a big fan of Decathlon and its brand and have bought sports items there for myself and kids since the store came to belfast. i have always found Decathlon products dependable and feel very disappointed by this product.
great looking jacket and fits well
leaks during heavy rain
Response of the brand
Hello Michael,

Thank you for your comments on the Forclaz 400 Men's Hiking Waterproof Rain Jacket and I am sorry to hear that you have have concerns with it. This coat comes with a 10,000mm schmerber waterproof rating and should have kept you dry. I can recommend trying to wash the coat using the care instructions written on the label on the inside and if you still have any further issues then to contact your local store / online team who should be able to help you further.

Christopher Penn | UK Product Trainer
Michael not found this answer helpful
High quality features at a low price
Excellent waterproof product
Used for 2 to 8 weeks
As a follow up from my review specifying that my old Forclaz 400 waterproof jacket leaked, I got in touch with Decathlon. Customer service, second to none ! My old Forclaz 400 (bought in June 2012) got refunded (a couple of weeks ago, so end of May 2016 !) without questions asked (despite it being purchased in June 2012 !!!!) and after talking at length with a mountaineer specialist I decided to go for the same model again. The New Forclaz 400 model has been improved compared to my 2012 model, and is now much more waterproof, and tested to support sustained heavy rain, to the extent that its waterproof aspect is now very close to matching those dedicated to "serial" hikers / mountaineers. I have discussed it with a few people, hikers and mountaineers, who have all warmly recommended this product to me, including Decathlon's mountain specialist staff. This is what swayed my decision. You look elsewhere, you won't find a product of equal quality at that price. I'd highly recommend this product (although, I haven't yet fully tested it under draconian rainy conditions, but under heavy UK water, it worked !). Note: you can add to this a waterproof spray by Decathlon for £3.99. According to Decathlon's staff, depending on usage, you spray your jacket every 6 months to ensure that its waterproof ability is retained (for instance, if you often wear a backpack) ....
Design, quality, waterproof, light
None so far
Leaked ! Wet after a day of sustained rain.
Used for More than 2 years
I bought this jacket in 2012. I have been using it moderately since then. Never had a problem, it used to do its job. Having said this, I never really used it under heavy sustained rain. Over the week-end I spent some time in Paris, and had 1 day of reasonably heavy, sustained rain. At the end of the day, items I had in my pocket became wet, my clothes also, unpleasant feeling. I have always been a big fan of Decathlon and its brand and have bought sports items there my whole life, any sport. In this instance, I have been very disappointed by the product. First time I feel let down. My first serious use of the product, and it didn't stand up the test of time. Disappointed !
Weight, design
Cannot cope with sustained rain!
Response of the brand
Dear Sir,
I'm really sorry to hear about your inconvenience with the Quechua Forclaz 400 Jacket.
I have already forwarded your feedback to our product manager in France.
If you are not satisfied with the product you can return it to your closest store for an exchange or a refund.
Kind regards,
Reka Engel Angyal UK Market Manager Mountain sports DECATHLON
Herve found this answer helpful
Great value shell jacket
Im on my second jacket and ive been upto Everest base camp, the Kongma la pass, Gokyo Ri etc all over 5500m for 2 months trekking every year for the last 5 years. Great water repellancy and breathability. Good long sleeves great for cycling, pit zips for temp control on the trail, volume adjustable hood and waterproof pockets and zips. Superb value and no noticeable difference from a goretex shell for many times the price of this jacket. Mine started leaking after 3 years heavy use but Decathlon replaced free of charge.
Brilliant jacket
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Used for 1 week or less
So far I've been wearing it on two hiking trip during the Easter vacation. It has been quite wet during the trip, but the water resistant material has kept me completely dry during the few hours I have been hiking. I haven't tested out further than 4 hours, I hope it doesn't come to that anytime soon!
Light weight, Water Resistant, Easy to move in
Nothing so far