Forclaz 400 Men's Hiking Waterproof Rain jacket - black



Made for mountain hikers who want protection from heavy rain and wind.
This raincoat is robust, breathable, ventilated and is at a competitive price. Another advantage? It is stretchy making movements easier!
Sizes guide

WaterproofTested in storm conditions, 100L water/sqm for 3 hours. 3-layer mat. (10000 mm)
BreathabilityMaterial limits condensation inside the garment. Hydrophilic coating (RET=6).
VentilationVentilation zips under the arms that wick away perspiration.
Freedom of movementStrechable fabric (13% elastane) for optimal comfort during use.
LightweightWeight:590 g in size L.
PocketsThree waterproof secure pockets. Two mesh inner pockets.
Environmental impactLife cycle comparison: Men's waterproof jacket -
Warranty2 Years
Technical Information

Sizing information and cut
Fitted cut to fully benefit from the stretch component.Jacket's inner volume allows you to wear it over a warm second layer such as a lightweight pullover or fleece.
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.
Wrist adjustment
Tightening tabs with velcro.
Main component
Triple-coated stretch fabric.
Additional recommended products
Forclaz Rain overtrousers protect the lower half of your body for a complete and effective rain protection system for your mountain outings. Care products: waterproofing spray or liquid in the machine To renew the fabric's water repellent properties and optimise performance throughout the lifespan of your garment.
Waterproof component
We measure a fabric's resistance to water pressure, expressed as a water column of mm (based on the ISO 811 standard). The higher the water pressure withstood, the more waterproof the fabric. Components scoring 2000 mm can resist the pressure from 2000 mm of water (which is equivalent to a rain shower lasting two hours).
This garment has been shower-tested using 100 litres of water/sqm/hour for 3 hours. This test reproduces the conditions of a violent storm in the mountains.
Component 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.
Consists of 3, 2 or 2.5 layers
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 repellency
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 water repellent property is achieved by treating the fabric's exterior. This treatment must be renewed throughout the garment's lifetime (recommended after every three washes). All Quechua waterproof jackets have received water-repellent treatment.
Comparative note on the environmental impact of products
The environmental impact of each product is calculated for the product's entire life cycle, using different indicators. A general ABCDE mark is attributed to help you identify the best environmental performance by comparing products to each other (t-shirts, rucksacks, etc). Decathlon is a voluntary supporter of the environmentally-friendly labelling approach.For more information visit:
Information / Concept / Technology
Main fabric : 87.0% Polyamide (PA), Main fabric : 13.0% Elastane Lining : 74.0% Polyester (PES), Lining : 26.0% Elastane

Product test
Our design team is based at the foot of Mont-Blanc, in Haute-Savoie (France). All year round, we create and develop products that are beautiful, simple and technologically advanced. These are then ruthlessly tested in the field, as 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. All our Decathlon stores offer a complete range of products specially designed to care for water-resistant and breathable fabrics. 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
Great jacket
Verified purchase What is a review "Verified purchase" ?

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We can confirm purchases for the reviews expressed on a request by e-mail after purchase or when the customer has this review from his personal space.

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The label "Verified purchase" lets help you judge the reliability of a review.
Used for 3 to 6 months
Very happy with jacket .im usualya medium but bought large . Good fit ,very comfortable stretchy fabric. So far very waterproof. Pit zips a bonus . Will probably buy another !
Great jacket at a fantastic price
Used for 7 to 12 months
Great lightweight waterproof/windproof at a fantastic price. Bought it as a backup but now use it all the time for hiking and also biking and snowboarding in spring conditions. Performs as well as my other jackets at 4 times the price. A couple of reviews on here say the jacket leaked - they were purchased 3 to 5 years ago! Whatever product you buy you need to regularly clean and maintain the waterproofing otherwise performance will suffer. That said mine is still beading well 9 months on .Definitely recommend.
Excellent Jacket
Used for 2 to 8 weeks
I use this jacket for playing tennis outdoors in the winter, cycling and running. The elasticity in the material provides a lot flexibility when doing sports and the under arm zips ensure you don't get too hot. I haven't been out in torrential rain but it has kept me dry in a medium downpour. It is well made, good value and significantly better than a Berghaus I had to return recently.
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