The Beast Returns Named after the wolf-child of a Norse god, Fenrir is the fierce and formidable protector. Over the last decade, it’s earned its namesake by becoming a benchmark in alpine insulation. Trusted on Everest, relied on in polar crossings, and praised by thousands who brave the extreme cold. Known for its exceptional warmth-to-weight performance, its durability, and its legendary review pedigree. Now, Fenrir returns – lighter, warmer, and more refined than ever. Now 65g lighter, with a sharpened silhouette, narrowed baffles for improved thermal efficiency, and a redesigned hood system for superior protection and comfort. A longer dropped hem improves coverage, while enhanced articulation across the sleeves and shoulders boosts mobility on technical terrain. At its core lies 850 Fill Power hydrophobic goose down, with a premium 93/7 down-to-feather ratio, and our DownTek™ down stays dry 10x longer and dries 3x quicker than standard down. Synthetic insulation is body-mapped to moisture zones - including cuffs, collar, and shoulders – bolstering performance even in damp conditions. The outer is Pertex® Quantum Pro, a windproof, highly water-resistant fabric made from 100% recycled fishing nets via Bureo® NetPlus®, with a PFC-free DWR finish. Claiming world-first status in 2024, this jacket remains a pioneer in combining expedition-grade function with responsible innovation. The down-filled hood features a concealed aperture adjustment and added peak. The collar’s refined for comfort when worn down. Finishing touches include technical stretch cuffs, anti-snag hem cords, insulated hand warmer pockets, and a separate stuff sack. Lighter. Warmer. Wilder. Meet the new Fenrir.Our ethical approach complies with the Responsible Down Standard, and our hydrophobic down uses bluesign®-approved clean chemistry for its water repellent treatment. Also available as a gilet.Reviews displayed include the earlier editions of the Fenrir. We’ve kept them here to showcase the Fenrir's legacy while introducing this new world-first version.