Patagonia’s Technical Insulation Explained (And Why You Might Choose Synthetic)

As veterans of many ski seasons, Matt and Rach are our layering and insulation experts. Our Puffy Professionals, if you will. And they reckon synthetic insulation is worth your attention.

Down season is just around the corner, but did you know that the ‘down jacket’ you keep referring to, might not actually contain any down? Even more shockingly, this might not be a bad thing either. Synthetic isn’t actually a dirty word when it comes to technical insulation. 

When you think about Patagonia, you probably aren’t thinking about the word synthetic. But as it turns out, the ‘s’ word has an important role to play in our gear closets, thanks to some of its practical benefits as an insulator.

I’ve owned the same Patagonia Down Sweater for over ten years. It’s been with me on more adventures than any one person, or any other piece of gear. Unlike a hiking pack, a rain shell or a pair of climbing shoes, an insulated jacket is such a versatile layer, it’s basically a must-pack for everything from hiking, climbing, skiing, and camping.

A decade of Down Sweater going strong

However, despite how attached I am to my well-worn down jacket, I do find myself reaching for its synthetic counterpart more and more when heading outdoors these days. Let me tell you why.

The Down vs Synthetic Debate

When it comes to insulated jackets, two things can be true. One, down is great. And two, (contain your shock) synthetic is also great. These two insulations each have a role in your outdoor layering arsenal. The trick is to know when to invest in, when to pack, and when to wear each kind of insulation.

Down is made from the soft, fluffy underlayer of duck or goose feathers. While these are some of the world’s most ‘waterproof’ birds, this down is found underneath the outer, waterproof feathers, meaning it’s actually absorbent and gets wet pretty easily. 

Synthetic insulation is a human-made answer to this problem. It recreates the puffy, warming properties of down with polyester, but without the soggy downsides of down.

How Synthetic Gets the Upper Hand on Down

There are three key areas where synthetic insulation outperforms down: 

1. It stays warm when wet
2. It retains its loft
3. It dries faster

When down gets wet, it clumps together, reducing its ability to heat you up as the warm air pockets around the down no longer exist. On the other hand, synthetic insulation is less absorbent and holds its structure even when wet, meaning you’ll stay warm if you get caught in a squall. And if you do get caught out, it has the added benefit of being able to dry much quicker than down.

If you’re pretending this won’t happen to your down jacket you’re lying

Even when it’s dry, synthetic insulation holds its loft better than down after being stuffed in a pack. That means you can just throw it on and not need to flap it around like you’re making the bed to get the insulation to puff back up.

The Options: Breaking Down Patagonia’s Insulation Range

With names like Nano-Air, Nano Puff, and Micro Puff, you’d be forgiven for not knowing where to start with Patagonia’s technical insulation. Rather than a one-size-fits-all approach, Patagonia has a lineup to suit all activities and temperatures.

Nano-Air: For High Output Activities

The Nano-Air is Patagonia’s lightest insulated option. In fact, they call it ‘featherlight warmth’ but you won’t find any feathers inside this midlayer. Instead, it contains their FullRange insulation, a high-performance and stretchable synthetic insulation made from 100% recycled polyester and designed to go inside the layers you wear during the most intensive, high output activities.

The Nano Air is designed for adaptive warmth on the move

This is the kind of layer you can throw on at the start of a hike in chilly conditions, without worrying about overheating minutes later. There’s nothing worse than stopping 100 metres into a hike to strip off layers, and then being immediately cold. The Nano-Air is designed to be a layer you should forget that you have on. Perhaps the highest praise of all. 

On the Women’s Nano-Air Ultralight Full-Zip Hoody (and Men’s equivalent), the insulation is also strategically placed around the hood, shoulders, upper arms, chest, and back, but left off under the arms. Instead, there you’ll find breathable underarm panels that vent heat and provide a more streamlined fit.

Underarm panels vent heat as it builds up

Micro Puff: Maximum Warmth To Weight

The Women’s Micro Puff Jacket and Men’s Micro Puff Jacket are perhaps the pinnacle of synthetic insulation. Patagonia says it’s, ‘the best warmth-to-weight ratio of any jacket we’ve ever created and the highest compressibility of any of our synthetic jackets’.

The Micro Puff also looks fantastic

Insulated jackets have been Patagonia’s bread and butter for decades, so this is saying something. This bold statement is thanks to Patagonia’s revolutionary PlumaFill insulation which imitates nature and copies the exact structure of down insulation, without the drawbacks of clumping when wet.

The jacket has a more technical appearance than your usual down ‘sweater’, with an innovative quilting construction that also maximises the warmth-to-weight of the insulation with minimal stitching.

The functional quilting is eye-catching too

Like its Nano-Air counterpart, its insulation is made with 100% recycled polyester. However, this jacket’s Pertex Quantum shell fabric is made from 100% recycled nylon ripstop made from recycled fishing nets and also boasts a PFAS-free durable water repellent (DWR) finish.

If you’re after a ridiculously packable jacket (it stuffs neatly into its own chest pocket) that weighs very little (252 grams or about 3.5 cliff bars) then look no further. 

Nano Puff: The ‘Magic Jacket’

If Patagonia’s synthetic jacket range had a team captain, it would be the Nano Puff. 

This jacket first arrived on shelves and (rock) walls back in 2009, after Patagonia built it for climbers who needed a weather-resistant, lightweight, and packable layer. It’s had some tweaks over the years, like fit refinements for even better mobility, and it’s gathered a cult following as the favourite midlayer for climbers, skiers, and hikers. 

Not Matt choosing the ‘team captain’ jacket for himself

If you only have room in your gear closet (and budget) for one puffer jacket, then this is the one.

The Women’s Nano Puff Jacket and Men’s Nano Puff Jacket are both filled with 100% recycled polyester insulation (PrimaLoft Gold Insulation Eco, to be precise). Like the micro puff, it has a 100% recycled polyester ripstop shell and a PFAS-free DWR coating to shed moisture. This makes it durable enough to wear as an outer layer, and sleek enough to be a midlayer in cooler conditions. 

Peace of mind in the wet makes synthetic insulation a winner

Down Sweater Jacket, Durable Down Parka, and FitzRoy Down Hoody

These three down jackets round out Patagonia’s technical range of insulated layers. 

The Down Sweater stands out as an icon of Patagonia design. When conditions are dry, or I want a more casual aesthetic without the crosshatched stitching of the nano-puff (as smart casual as a down jacket can be) this jacket has been my go-to.

Unlike the down sweater, you’ll probably stand out at dinner wearing The Durable Down Parka or Fitz Roy Down Hoody, but both are designed for maximum warmth in dry, alpine conditions. In these settings, down remains undefeated.

Synthetic Doesn’t Mean Second Best

When you’re deciding the right insulated jacket for you, consider what you’re using it for, where you’re using it, and what the conditions might be.

The warmest jacket is the one you can actually wear in the moment. If it’s wet, a down jacket that might be warmer on paper, won’t be the practical choice. Down does still have the edge in cold, dry environments, but once there’s a drop of rain or moisture, then human-made insulation takes the win.

If Patagonia of all brands can conclude that synthetic isn’t a dirty word when it comes to insulation (and given the recycled content, is actually a pretty clean one) then we can too!