Fenrir Lightweight Hooded Down Jacket
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Fenrir Lightweight Hooded Down Jacket
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Fenrir Expedition-Grade Down Jacket

£329.00

High-loft lightweight down jacket delivering our maximum warmth to weight performance.

850 Fill Power DownTek™ hydrophobic goose down with a 93/7 down/feather ratio. Pertex® Quantum Pro outer, made from 100% recycled fishing nets via Bureo® NetPlus®. 65g lighter for 2026, with narrower baffles, enhanced articulation and a redesigned hood. PFC-free DWR finish. Synthetic insulation at cuffs, collar and shoulders. Stuff sack included. What 850 fill power means in practice — and when to choose Fenrir — is in the details below.

Our ethical approach complies with the Responsible Down Standard. Our hydrophobic down uses bluesign®-approved clean chemistry.
Colour Black
Size Small

Sizing charts

The measurements in the charts refer to your body measurements. Measure your body as described and then choose the corresponding product size.

Men's Sizing

Small
EUR 46 - 50 		Medium
EUR 50 - 52 		Large
EUR 52 - 54 		X Large
EUR 54 - 56
Chest 96 - 102 cm
38 - 40 in.		 102 - 106 cm
40 - 42 in.		 106 - 111 cm
42 - 44 in.		 111 - 116 cm
44 - 46 in.
Waist 76 - 81 cm
30 - 32 in.		 81 - 86 cm
32 - 34 in.		 86 - 91 cm
34 - 36 in.		 91 - 96 cm
36 - 38 in.
Inside Leg 80 cm
31.5 in.		 81 cm
31.9 in.		 82 cm
32.2 in.		 83 cm
32.7 in.



Women's Sizing

X Small
UK 6 - 8
EUR 34 - 36
US 2 - 4 		Small
UK 10 - 12
EUR 36 - 38
US 6 - 8 		Medium
UK 12 - 14
EUR 40 - 42
US 8 - 10 		Large
UK 14 - 16
EUR 42 - 44
US 10 - 12
Bust 82 - 86.5 cm
32 - 34 in.		 86.5 - 91.5 cm
34 - 36 in.		 91.5 - 96.5 cm
36 - 38 in.		 96.5 - 101.5 cm
38 - 40 in.
Waist 64 - 68.5 cm
25 - 27 in.		 68.5 - 73 cm
27 - 29 in.		 73 - 77.5 cm
29 - 31 in.		 77.5 - 82.5 cm
31 - 33 in.
Low Hip 88 - 92.5 cm
34.5 - 36.5 in.		 92.5 - 97.5 cm
36.5 - 38.5 in.		 97.5 - 102.5 cm
38.5 - 40.5 in.		 102.5 - 107.5 cm
40.5 - 42.5 in.
Inside Leg 77 cm
30.3 in.		 78 cm
30.7 in.		 79 cm
31.1 in.		 80 cm
31.5 in.


How to measure

 

Measuring guide

Chest/Bust

With the tape under your armpit, measure across fullest part and across shoulder blades.

Waist

Measure around natural waistline at the narrowest part.

Low Hip

Measure around the widest part of the hip bones.

Inside leg

In a standing position, measure from top of inside leg at crotch to ankle bone.
Delivery £3.99. Next Day £9.99
Use & Highlights

When to use — Cold weather insulation layer under a shell; capable as a standalone piece in cold but settled conditions; the warmest jacket in the Jöttnar range for its weight. Choose when weight matters most.

850 Fill Power — what it means — 850 is expedition grade: each ounce of down occupies more loft space and traps more air than lower-rated fills. Combined with a 93/7 down-to-feather ratio, this is as close to pure loft as a down jacket gets. The 2026 update adds narrower baffles for improved warmth and compressibility.

Hydrophobic down — DownTek™ treatment bonds to each filament at a molecular level — the down retains warmth when damp rather than collapsing. Stays dry 10x longer and dries 3x faster than untreated down.

NetPlus® outer — Pertex® Quantum Pro 30D outer woven from Bureo® NetPlus® reclaimed fishing nets — fully traceable to source and a more demanding standard than standard recycled nylon.Windproof and highly water-resistant. PFC-free DWR finish.
Synthetic reinforcement zones — 100g/m² synthetic insulation at the cuffs, collar and shoulders — the zones most exposed to moisture and compression that compromise down performance.

Hood — Down-filled hood adds warmth at the head and neck. Adjustable with a glove-compatible concealed cord. Redesigned for 2026.

Weight & packability — 65g lighter for 2026. Stows into separate stuff sack.

Ethics & sustainability — Responsible Down Standard compliant. DownTek™ treatment uses bluesign®-approved clean chemistry. Outer woven from Bureo® NetPlus® reclaimed fishing nets.
Tech Specs & Care

Outer fabric
Pertex® Quantum Pro 41gsm
30D micro ripstop
Bureo® NetPlus® 100% recycled fishing net nylon
PFC-free DWR finish

Fill
850 Fill Power DownTek™ hydrophobic goose down
93/7 down/feather ratio
Stays dry 10x longer, dries 3x faster than untreated down
Synthetic reinforcement
100g/m² synthetic insulation at cuffs, collar and shoulders

Hood
Down-filled, redesigned 2026
Glove-compatible concealed cord adjuster
Added peak

Cuffs
Technical stretch cuffs

Draw cords
Anti-snag hem cords

Pockets
2 × insulated hand warmer pockets
1 × internal zipped valuables pocket

Weight & fit
410g (men's medium inc. stuff sack). 65g lighter for 2026 vs previous version
Narrower baffles, enhanced articulation

Stuff sack
Separate stuff sack included

Care
Machine wash 30°C — gentle wash
Tumble dry cool
Do not dry clean, do not iron, do not bleach

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