Description
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®. 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.
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.
Weight & packability—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.
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