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Guide
Men’s Insulated Jackets
An insulated jacket is the warm layer in your pack. It weighs little, packs small and has to go on over everything at the summit, even with gloves on.
Key points
- Down gives warmth for less weight; synthetic keeps you warm when damp.
- A break jacket needs a roomy cut, or the next size up, to fit over your shell.
- Active insulation lets air through and stays on during the climb.
- Hood over the helmet, two-way zip for wearing with a harness.
Buying advice
Which insulated jacket suits you?
Five questions on use, movement or breaks, fit, fill and budget help you choose. You can select synthetic insulation.
- Compare by use
- Check fit and features
Which insulated jacket when?
| Use | What matters | Your jacket |
|---|---|---|
| Cold climbs | What mattersRelease heat instead of trapping it | Your jacketActive insulation, air-permeable, close-fitting |
| Summit break | What mattersWarm up fast, even when sweaty | Your jacketRoomy jacket with a hood, over the shell |
| Descent in frost | What mattersFreedom of movement under the shell | Your jacketThin synthetic or down jacket, slim cut |
| Freeride day on the lifts | What mattersLong chairlifts, wet snow | Your jacketSynthetic fill that copes with damp |
What to look for
| Question | In short | Why |
|---|---|---|
| Down or synthetic? | In shortWeather and sweat decide | WhyDown is lighter and packs smaller for the same warmth. Synthetic keeps insulating when sweat or snow makes it damp, and dries faster. |
| How warm is warm enough? | In shortCompare the fill | WhyFor down, the fill weight in grams tells you most; for synthetic, the insulation weight in g/m². With the same material, higher means warmer. |
| Which size? | In shortTry it over a shell | WhyArms overhead, then forward. Sleeves stay at your wrists, your lower back stays covered and the shoulders don’t pull tight over the shell. |
| How small does it pack? | In shortInto its own pocket | WhyMany models stuff into one of their pockets, leaving room in your pack for shovel, probe and skins. |
Frequently asked questions
What is active insulation?
A thin, air-permeable fill you keep on while moving. It lets heat and moisture out instead of trapping them. For long breaks in frost it is too thin.
Over or under the shell?
On breaks, over it: quick to pull on without taking the shell off. On cold descents, under it, so it needs a slim fit. One jacket rarely does both well, so decide which role matters more.
Can I wear down in wet snow?
Under a waterproof shell, yes. The down then gets damp mainly from sweat. If you sweat a lot or are out for several days, synthetic is safer because it keeps warming when damp.
Does it need a hood?
For summit breaks, yes. It should fit over your helmet, since that usually stays on at the top.
Last updated: November 2026
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