Best Midlayer Fleeces 2025 - Outdoors Magic

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Mid and Base Layers

Best Midlayer Fleeces 2025

For effective, versatile layering during cold weather, or even as standalone warmth during mild summer days, a good fleece will go a long, long way

The dependable fleece. Able to join you on lofty summits, whilst being tucked under shell and insulating layers, yet still something that wouldn’t look out of place during a post-hike evening around the fondue pot, or when out and around town.

We’ve all got a favourite fleece in our wardrobe that can tackle all conditions – something that has been going strong for about 10 years of hard use. But with modern fabric developments, modern fleeces are now able to offer a whole lot more than the fleeces of a few years ago. These days, they don’t just offer something for warmth alone, you can also find something that’s unrestrictive, breathable, able to regulate your temperature, dry quickly, wick sweat and not weigh you down either.

When the mercury begins to rise again, many of the fleeces included in this roundup can also be used as a standalone layer. None of these fleeces will be fully wind or waterproof, but they’ll keep light rain and wind at bay whilst you’re keeping active through the mountains.

Best Midlayer Fleeces

I’ve been pretty lucky these past few months, with a host of separate skiing and hiking trips taking place. These have included two ski touring trips to the French Alps, with both single and multi-day hut-to-hut ski tours. There was also a hiking trip to Iceland which gave some great testing conditions, from driving rain and snow, to clear and dry conditions. It’s safe to say, these fleeces have been through the lot.

The Proton Hoody with the Aconcagua Pro layered beneath out for test in wet snow conditions, whilst ski touring in France.
The Aconcagua Pro had to breathe well on this particularly warm day whilst ski touring in France – it held up well.

Top Midlayer Fleeces | Our Favourites

  • Arc’teryx Proton – Best Women’s Midlayer Fleece

  • Jack Wolfskin Blizzard – Best Men’s Midlayer Fleece
  • Norrøna Trollveggen
  • Patagonia R1 Air
  • Berghaus Spitzer
  • The North Face 100 Glacier
  • Rab Alpha Flash
  • Alpkit Griffon
  • Houdini Power Houdi
  • Mammut Aconcagua Pro

 

Arc’teryx Proton Hoody

Price: £300
Weight: 320g

This midlayer admittedly blurs the line between fleece and fill insulation with the use of PrimaLoft’s extremely lightweight and breathable 100% recycled Gold insulation. Still, we’ve included the Proton into this fleece round-up rather than our best insulator round-up due to the amazing levels of breathability it offers. I felt like I was able to consistently moving fast through the mountains whilst this kept shifting moisture away from my body when worn next to a baselayer.

Arc’teryx have managed to achieve this impressive amount of breathability by pairing the insulation with a highly porous, yet lightly wind resistant Fortius Air outer fabric. This outer shell is also DWR treated, so as long as you care for the fabric, it will keep off light rain/snow showers.

A notable moment using the Proton was whilst I was ski touring in the Alps at a fairly high pace (around 70% heart rate range) over a constant period. I stopped at the top of a hill and realised that I hadn’t felt the need to unzip it to let any hot air escape at any point during the ascent.

All of this breathability and wind-proofing is paired with a fairly athletic fit and a slightly dropped back, with a low profile hood that will fit under a helmet. Whilst this jacket has been stripped down on weight, it still boasts four great outer pockets; one on the chest and two on the hip.

Full Specification

S – XXL / The Fortius Air 20 fabric / 100% recycled PrimaLoft Gold insulation / 20d plain weave Toray liner / low profile, fitted, adjustable under helmet hood / one zippered chest pockets / two zippered hand warmer pockets / PFAS-free DWR.

Buy The Arc’teryx Proton Hoody: £300 at Arcteryx.com

 

Jack Wolfskin Blizzard Fleece

Price: £160
Weight: 745g

If fleece has a drawback in performance terms, it’s that it’s not especially wind-resistant. And of course, its other major drawback is that it’s made of synthetic fibres, which are ultimately derived from petrochemicals and therefore not very eco-friendly. Jack Wolfskin’s Blizzard jacket attempts to overcome both of these issues with an innovative 3-layer fleece construction that incorporates exclusive Polartec Windbloc fabric, made from a fully recycled outer and inner plus a waterproof, breathable, Jack Wolfskin Texapore Ecosphere membrane in between – which is also made entirely from reused/recycled content.

The result is a windproof and highly weather-resistant fleece that works well not just as a midlayer but also as a warm outer layer in chilly, gusty and drizzly weather. It’d be well suited to weekend walks from spring through to autumn, but perhaps not – despite the name – the ideal piece of outerwear in an actual blizzard.

The Blizzard is basically a membraned ‘hard face’ fleece, which ensures it is windproof and water repellent. But it’s also warm and reasonably breathable too, as well as being soft and comfortable thanks to a brushed inner lining. Pit zips under the arms also help you to dump heat fast.

On the outside of the jacket, the shoulders and lower sleeves are reinforced with an extra-robust 500-denier Oxford polyamide (nylon) fabric, which should be very resistant to abrasion from pack straps as well as general wear and tear. Unusually, the jacket is also equipped with a rollaway lightweight hood that stows neatly in the jacket collar. Other features include 2 hand pockets, a chest pocket and an inner pocket as well as an adjustable hem.

Full Specifications

Polartec Windbloc 3-layer fabric / fully recycled outer and inner / waterproof-breathable, recycled and reused Jack Wolfskin Texapore Ecosphere membrane /  boxy fit / 3-season compatible / brushed inner lining / pit zips under arms / 500-denier Oxford nylon reinforced shoulders and lower sleeves / rollaway hood in jacket collar / 2 hand pockets / chest pocket / inner pocket / adjustable hem.

Read our full Jack Wolfskin Blizzard Fleece review.

Buy The Updated Jack Wolfskin Blizzard FZ Fleece: £130 at Jack-wolfskin.co.uk

Norrøna Trollveggen Thermal Pro Jacket

Price: £199
Weight: 500g

The trollveggen from Norwegian outdoor brand Norrøna is one sturdy midlayer fleece built with colder temperatures in mind. It’s designed for the harsh and rugged landscapes of Norway after all.

Made with 100% recycled polyester, the trollveggen uses Polartec® Thermal Pro® technologies to create air pockets that trap air and retain body heat. The result is a fleece with a great warmth-to-weight ratio and excellent breathability.

In terms of features there’s a zippered chest pocket, two hand warming pockets, elastic cuffs with thumb holes, a protective collar and articulated arms for freedom of movement.

Full Specifications

100% recycled Polartec® Thermal Pro® polyester fabric / zipped chest pocket / two hand warming pockets / elastic cuffs with thumb holes / protective collar / Y-cut / articulated arms / six colour options / S to XXL / Oeko-Tex Certified Fabric.

Buy The Norrøna Trollveggen: £199 at Ellis-brigham.com

 

Patagonia R1 Air Full Zip Hoody

Price: £140
Weight: 309g

In true Patagonia fashion, the R1® Air Full-Zip Hoody features some excellent sustainability efforts. Including 100% recycled polyester, the garment is also made in a Fair Trade Certified™ factory, something only a handful of other outdoor companies are committed to at the moment.

In terms of materials, the recycled polyester features a jacquard design with hollow-core yarns and a zigzag texture that wicks moisture very effectively. It also dries fast ensuring you stay warm when out and about.

Including a left-chest stash pocket, two front pockets, off-shoulder seams, a full-front zip and a slim-fit hood; there’s a lot to like here.

Full Specifications

100% recycled polyester jacquard fleece / hollow-core yarns / zigzag texture / off-shoulder seams / one chest pocket and two front pockets  / soft cuffs and hem / full-front zip / slim-fit hood / made in a Fair Trade Certified™ factory.

Buy The Patagonia R1 Air Full Zip Hoodie: £140 at Ellis-brigham.com

Berghaus Spitzer Fleece Jacket

Price: £60
Weight
: 393g

The Spitzer Fleece Jacket from Berghaus bridges the gap between a traditional fleece and something slightly more technical. With this, Berghaus claim that they’ve made a midlayer that’s designed for the coolest climates. Whilst we wouldn’t agree that this is the warmest in this roundup, Berghaus has certainly achieved an impressive amount of warmth for its weight.

The outer of the Spitzer consists of a tighter and denser weave compared to many of the other more lightweight offerings in this roundup. This not only gives the fleece a simple, traditional look, but also slightly improves wind resistance.

You’ve got a pair of handwarmer pockets on the Spitzer, which are nicely lined with a soft material to warm your digits whilst you’re keeping them tucked away from the elements. There’s also a basic hood option that will fit comfortably underneath a helmet.

Berghaus’s description that this fleece is ‘cut for comfort’ is spot on. I found the Spitzer offered a much roomier fit than some of the other fleeces in the roundup. That’s not to say it’s too baggy, and it’s by no means a complaint. I sometimes appreciate having a fleece that doesn’t feel like some sort of lycra catsuit, particularly when popping down to the pub for the post climb/walk beers.

Full Specification

S – XXL / two neat hand pockets /  close-fitting hood / 90% bluesign approved fabrics / under helmet hood option.

Buy The Berghaus Spitzer Half Zip Fleece Jacket: £60 at Berghaus.com

 

The North Face 100 Glacier 1/4 Zip

Price: £60
Weight
: approx. 302g

While not the most technical on the list, The North Face 100 Glacier 1/4 zip jacket is a bit of a staple on the midlayer market. You’ll have no doubt passed a skier or three rocking it out and about on the mountains at the après ski, I’m sure.

It’s made from a polyester microfleece that uses an effective, lofted structure to create both a warm and lightweight jacket overall. Like many temperature-controlling technologies out there, the Glacier utilises air pockets in the fabric to trap air and heat in the garment, while at the same time allowing for breathability.

Impressively, this fleece is also part of TNF’s Circular Design initiative, a collection designed to minimise waste and pollution by recycling garments and producing highly durable gear, amongst other things.

Full Specifications

1/4 zip microfleece / 100% polyester / sleeve opening and bottom hem binding / no shoulder seams / lofted structure / nine colour options / XS to XL / part of TNF’s Circular Design initiative / standard fit.

Buy The North Face 100 Glacier 1/4 Zip Fleece: £60 at Ellis-brigham.com

Rab Alpha Flash Jacket

Price: £120
Weight
: 273g

The first thing that you’ll notice when you pick the Flash Jacket up, is the weight (or lack of). At just 273g and packing a fair bit of warmth, Rab have introduced a few nifty features and fabrics to the classic fleece design.

First and foremost, they’ve used Polartec’s Alpha Direct fabric. If you’re not yet familiar with this, it’s rather extraordinary stuff. It has a very traditional feel, almost like pile fleece, but there’s way more to it than that. The temperature regulation it provides is truly excellent, and then there’s the warmth-to-weight. If you hold this up to a light, you can really see how thin the Polartec Alpha Direct fabric is, but then there’s also that lovely warm and cosy feel to it.

Stretch panels flank the sides of the fleece to further improve breathability and ensure there’s no restriction of you’re movement when you’re reaching upwards for a hold or at full stride while running. There’s also that useful zipped pocket for stashing away, say, your phone or GPS.

The one slight niggle that I had with the Alpha Flash Jacket was that it seemed to have excess fabric around the wrists, just before the cuff elastic pulls it all in. That’s it though.

Full Specification

S – XXL / Polartec Alpha 178g m² / Polartec Alpha Direct 120 insulation / Polygiene Stays Fresh Technology / slim fit / Half hem drawcord.

Read our full Rab Alpha Flash jacket review.

Buy The Rab Alpha Flash Jacket: £120 at Rab.equipment

​​

Alpkit Griffon

Price: £54.99
Weight
: 290g (size-dependant)

Another extremely lightweight fleece, the Griffon by Alpkit utilises a similar (but lower bulk) grid design to Polartec’s Power Air. This pattern creates pockets of warmth while also expelling any sweat vapour through small channels.

Alpkit have designed the Griffon with a close-to-skin fit, which means that it can also be used as a warm base layer, if you don’t mind the feeling of a full length zip next to your skin.

At only 290g (size-dependant) and with a £54.99 price tag, this is a hard to beat fleece with great value for money. Whilst it’s never going to be as warm as many of the other fleeces in this roundup, it will make a great summertime companion.

Full Specification

S – XXL / Alpkit’s 3 year alpine bond / full length Vislon zip / snug fitting lycra bound hood / external chest zip for valuables / two-tone smooth face.

Buy The Alpkit Griffon Microfleece Jacket: £54.99 at Alpkit.com

 

Houdini Power Houdi

Price: €240
Weight
: 478g

Houdini are known for creating clean looking, sustainable clothing and the Swedish company continue this trend with their Powder Houdi.

At 478g, it’s on the heavier side but makes up for it by using that powerful Polartec® Power Stretch® Pro™ fabric. Incidentally, this fabric is also Bluesign® approved. Not bad, not bad at all.

The design is slick too, including a two-way zipper on the full length zip, a shaped collar with a snug hood, extended sleeves with thumb loops, and a hidden draw cord in the bottom hem.

Full Specification

XS – XXL / high collar hood / Bluesign certified fabric / full length zip / visor on hood / Polartec® Power Stretch® Pro™ / high collar hood.

Buy The Houdini Power Air Houdi: €240 at Houdinisportswear.com

Mammut Aconcagua Hooded Fleece Jacket

Price: £94.96
Weight
: 433g

The Aconcagua fleece from Swiss manufacturer Mammut utilises high-quality fleece materials strategically designed to help your body manage its climate effectively. In short, the name of the game here is top-level temperature regulation.

It uses Polartec’s classic Power Stretch Pro fabric, an ingredient that has become a mainstay in the midlayer market. In short, it’s a 4-way stretch, shape retaining fabric that is engineered to be both moisture wicking and highly breathable. Work hard and this stuff breathes with you. Integrated into this is the abrasion-resistant nylon finish, further ensuring the jacket holds up against the wear and tear of mountain life.

The Aconcagua has also been designed with a classically European slim fit. I found this to be the closest fitting of all the fleeces that I tested in this roundup, so I’d suggest to size up if you usually prefer a more traditional fit.

Full Specification

S – XXL / YKK Vislon front zip / Polartec Power Stretch Pro / abrasion-proof nylon surface / under helmet hood / flat chin guard and zipper underlay / back-pack compatible side zipper pockets / Raglans sleeves / thumb loops.

Buy The Mammut Aconcagua Hooded Fleece Jacket: £94.96 at Alpinetrek.co.uk

 

The original version of this article was written by Jordan Tiernan. Recent updates have been made by Will Renwick and the OM team.

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