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Firn [Mens] Down jacket

Lightweight 550 fill power duck down micro jacket; uncluttered and packable, it makes an excellent standalone jacket for cool weather walking and fits well under a shell when the weather closes in

Firn [Mens] Light and packable 550 fill power duck down micro jacket for winter walking
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  • Reef - Firn [Mens] Light and packable 550 fill power duck down micro jacket for winter walking
  • Rocket - Firn [Mens] Light and packable 550 fill power duck down micro jacket for winter walking
  • Steel - Firn [Mens] Light and packable 550 fill power duck down micro jacket for winter walking
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It’s always been about getting outdoors. For that we didn't necessarily need all the mod-cons, we needed kit that simply worked so that we could focus on enjoying ourselves.

Firn is a jacket that simply does what it’s meant to, keeping you insulated and protected whether you wear it as a standalone outer layer or under a shell for extra protection when the weather really gets brutal. 

Firn is really warm for its weight and packability thanks to its ethically-sourced duck down filling, so it takes up little space in your pack when you're not wearing it on the uphill slogs, but lofts nicely to keep you well-insulated when you’re descending into the valley and need a warm boost.  

It has narrow stitch-thru baffles (AKA micro baffles) which keeps the down in the right place and gives it a slim silhouette that makes it ideal for active use when you don’t want to feel too swaddled.  

When the weather’s brutal and you’re craving that ‘swaddled’ feeling, those micro baffles, its close-fitting collar and an uncluttered design let the Firn jacket sit comfortably beneath your shell jackets. The elasticated cuffs keep a low profile, so they slip easily below your glove cuffs or your waterproof’s sleeves to create a seal against the draughts. 

For the days when you’ve forgotten your gloves, Firn has two zipped hand pockets to bury your hands in. You also have a zipped internal chest pocket for stashing your phone or keys. 

Firn’s nylon fabric feels soft and light against your skin, making it really comfortable to move in. It has a water repellent coating on the outer fabric to fend off moisture and dirt. 


We use only RDS certified down; all our down is audited by a third party to ensure that it comes from birds who are not live-plucked, force-fed, or mistreated. That’s good know. 
Versatile and uncluttered, Firn gives you excellent ‘no-frills' insulation so that you can keep getting out on the hill in cold conditions. 

Key features
  • 3 Year Alpine Bond
  • Light, warm and packable pure duck down jacket for winter walking.
  • Layers comfortably under a shell or outer layer thanks to its low bulk and uncluttered design.
  • Close-fitting collar without a hood is excellent for layering.
  • Micro baffles create a slim silhouette, giving you more freedom of movement.
  • 2 zipped hand pockets and 1 internal zipped chest pocket for your valuables.
  • Low profile lycra-bound elasticated cuffs sit below your glove cuffs to seal out the draughts.
  • Simple hem drawcord adjustment to keep out the cold.
  • A DWR coating keeps the moisture at bay.
  • RDS certified ethically-sourced duck down.
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Vital stats
Weight (Total/Fill) 

S: 300/124 g; M: 320/132 g; L: 340/140 g; XL: 350/148 g; XXL: 360/156 g


Fill: 80/20 duck down; RDS certified 
Fill power: IDFB 550 
Main Fabric: 100% nylon, 20d, 36 gsm 
Lining: 100% nylon, 20d, 38 gsm 
Construction: Stitch-Thru 

Environmental Considerations

The chemical finish that keeps water beading off your jacket has changed. 
As with all garments from responsible outdoor brands, our DWR treated garments meet international environmental standards and require occasional washing with a technical wash to maintain their high breathability. 
This wasn’t always the case. Years ago, garments were treated with chemicals that had toxic by-products that lingered in the environment for generations. Those old chemicals needed little maintenance, whereas modern waterproofs need regular washing. 
We fully support this change. In fact, we quite like the idea of taking time to look after our kit so that it lasts a long time. 
We are committed to reducing the environmental impact of all our products –in fact it’s in our DNA: we can’t imagine ever doing anything else. We always review the materials we use, manufacturing methods and our own consumption of resources. We do the research, make informed decisions, and choose the best option available to us.

Product Care Information

You can and should wash this garment, most active outdoor folk do this once or twice a year.

Washing and re-waterproofing flushes out the dirt and oils that have accumulated so that it puffs up nicely and works better in damp conditions

Don’t panic! Down is surprisingly durable and washing is not an onerous task. You can wash it in a front loading washing machine with our detailed instructions (see the FAQs).

Size chart
Men's sizing
Chest (inches) 37" 40" 43" 46" 49"
Waist (inches) 30" 32" 34" 36" 38"
This size chart indicates the body measurements our garments are designed to fit. Measure yourself as described below, and use the size chart to find your size.
Chest: measure around your chest at the widest part. The tape measure should pass under your arms, and be level from front to back.
Waist: measure around your waist at the narrowest part.
Hips: standing with your feet together, measure around your hips at the widest part.

Product Support Team Advice

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What You Say: Customer Reviews and Comments

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Just William
Great addition to my winter kit!

Received my new Firn down jacket (Steel M) today and looking forwarded to trying it out in the Lincolnshire Wolds this weekend. Nice slim fit, like the colour and appears well made.