Montane Alpine 850 Nano Down Hoodie

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UOG TOP PICK: Top Pick for Lightweight Warmth: The Montane Alpine 850 Nano Down Hoodie combines cutting-edge quick-drying down, sustainable materials, and an ultralight design, making it an essential insulation layer for adventures in any weather throughout the year.

Montane says: 

The Alpine 850 Nano Hoodie’s uncompromising, high-performance design keeps you warm in the high places without weighing you down. It’s filled with 60g (Men’s Medium) of high-quality, fast-drying 850 fill power ExpeDRY™ goose down, with panels of synthetic insulation in high-moisture areas for outstanding thermal efficiency. The 100% recycled 10D ripstop outer fabric has a PFC-free DWR for lightweight windproof protection, and our improved Trim fit makes this the ultimate lightweight down jacket for technically demanding, high-altitude terrain where every gram counts.

Our Verdict

I’ve been putting the Montane Alpine 850 Nano Down Hoodie through its paces since April, and it’s impressed me from the very start. Montane sent it to me before my TGO Challenge; since then, it hasn’t left my pack. It’s become my go-to insulation layer for everything from cold bivvies to windy summits, offering warmth without weighing me down.

One of the standout features is the ExpeDRY™ goose down, which Montane promotes as a fast-drying technology due to real gold particles bonded to the down. At first glance, this sounded more like a marketing gimmick than anything practical. However, I’ve been genuinely surprised by how well it works. In damp or high-humidity conditions (or a rainstorm coming back from the pub one night), the down dries noticeably quicker than others I’ve used. That’s a game-changer, especially in environments like the Scottish Highlands, where staying dry is never guaranteed.

Weighing in at just 227g for the medium, the Alpine 850 Nano is impressively lightweight, making it ideal for those counting every gram. Despite its lightness, it doesn’t compromise on warmth, thanks to the 850-fill power down and well-placed synthetic insulation panels in high-moisture areas. These panels keep bulk to a minimum while ensuring you stay warm and comfortable.

The 100% recycled Pertex Quantum outer fabric is another win for sustainability, and it’s surprisingly It is durable for how thin and lightweight it feels. The PFC-free DWR coating adds windproof protection, which has been invaluable on those windy days, and the trim fit moves well with the body, especially during technical activities like climbing or scrambling. It fits easily under a shell without feeling restrictive, and the micro-bound hood adds a good layer of warmth when needed.

While it’s packed with features—like elasticated cuffs and hem, as well as lightweight YKK zips—the blend of warmth, weight, and quick-drying ability genuinely sets this jacket apart.

– Reviewed by Ultralight Outdoor Gear

In-depth Reviews:

• Montane Alpine 850 Nano Down Hoodie Review – “I’ve loved this jacket since the moment I first tried it on. Super lightweight, really comfortable on and offering a lot of warmth for its weight.”
• Montane Alpine 850 Nano Down Hoodie Review – “A highly technical, lightweight down hoodie, for active people with high demands for packable, performance”
• Montane Alpine 850 Nano Down Hoodie – ”Whether layering up on cool summer mornings or braving sub-zero winter conditions, this hoodie has consistently impressed with its versatility, warmth, and innovative design.’

Features

• EFFICIENT PERFORMANCE. Heat Without Compromise. The lightweight materials and essential features of the Alpine Nano 850 have been critically engineered for maximum performance and minimal weight, with no compromise. By focussing on thermal efficiency, this lightweight, goose down jacket pushes the limits of what’s possible to achieve in protection, breathability, and warmth in very cold environments.
• ExpeDRY™ GOOSE DOWN. Fast-Drying Real-Gold Tech. The Alpine 850 Nano Hoodie is filled with 60g (Men’s Medium) of goose down, which has non-toxic gold particles bonded to it for fast-drying performance and industry-leading warmth. The inert, chemical-free technology works because gold particles vibrate water molecules, just like heat, to speed up evaporation to a rate faster than the absorption rate of down and manage moisture from the body too.
• TRIM FIT. Tailored For Movement. Our new Trim fit has been developed to move with you during fast and light activities in the mountains, so that you can reach for climbing holds and turn your body without resistance. It has been optimised to fit underneath a Trim shell but can also be paired with other fits.
• Our new insulated block has improved fit ergonomics and is engineered with optimum arm lift for mountain activities and technical movements in mind
• Specifically placed synthetically insulated panels reduce bulk and manage moisture
• Reduced vertical seams optimises ergonomic patterning for a precision fit and reduces construction for a lower weight
• Micro bound hood offers critical protection
• Elasticated cuffs seal in warmth
• Micro elasticated hem for light protection from cold weather ingress
• Lightweight YKK zipped centre front
• Lightweight YKK zipped hand pockets
• Trim fit

Specifications

• Small weighs: 215g
• Medium weighs: 227g
• Large weighs: 235g
• XLarge weighs: 252g

Material & Construction

• PERTEX QUANTUM 100% Nylon (recycled) 10D ripstop with PFC Free (C0) DWR coating for lightweight, windproof protection
• 60g (Men’s Medium) of ALLIED FEATHER RDS certified ExpeDRY™ 90/10 Goose Down 850FP highly effective thermal protection, that dries faster and stays dry in high humidity and extreme conditions
• PRIMALOFT GOLD 100% Polyester (recycled) insulation for high moisture areas

Help & advice:

• About Montane
• Recycled Content in Outdoor Gear
• Why is ‘PFC Free’ Important?
• The Ultimate Guide to Choosing an Ultralight Down Jacket
• Down Quality
• All About Down
• Hydrophobic Down
• Responsible Down Standard
• Ethical Down