A ski jacket has a harder job than almost any other piece of clothing you own. It has to keep out snow, sleet and 60 km/h wind on a ridge, let sweat escape when you are working hard, survive ski edges and chairlift bars, and still be comfortable for eight hours. Price tags and marketing names do not tell you much about whether a jacket can do that. Three things do: the fabric, the insulation and the details.
1. Waterproofing and breathability
Ski jacket fabric stops liquid water from getting in while letting water vapour from your body get out. It does this with a membrane or coating whose pores are far smaller than a water droplet but larger than a vapour molecule. On top sits the face fabric, treated with a durable water-repellent (DWR) finish that makes water bead and roll off.
What waterproof ratings mean
Waterproofness is measured in millimetres: the height of a column of water the fabric can hold before it leaks. Higher is more waterproof. Pressure matters as much as rain, because sitting on a wet chairlift or kneeling in snow pushes water into the fabric.
Breathability is rated in grams of vapour passing through a square metre of fabric in 24 hours (g/m²/24h). Around 5,000 g suits relaxed skiing, 10,000 g covers most active resort skiers, and 15,000 g or more is worth having if you hike, tour or run hot. Vents matter just as much: no membrane breathes as well as an open zip.
Do not forget the seams
Every stitch is a hole. Critically taped jackets seal the seams most exposed to weather (shoulders, hood, chest). Fully taped jackets seal every seam. If you ski in wet, coastal or spring conditions, fully taped is worth it.
2. Insulated jacket or shell?
This is the biggest decision, and it depends on how you ski rather than on which is “better”.
| Insulated jacket | Shell jacket | |
|---|---|---|
| Warmth | Built in. One jacket covers most winter days. | None. Warmth comes from your mid layers. |
| Versatility | Best from December to March. | Works from deep winter to spring by changing layers. |
| Simplicity | Put it on and go. | Needs a layering system that works. |
| Best for | Resort skiers, cold chairlifts, people who run cold. | Touring, high effort, people who run hot. |
Most resort skiers are happiest in a lightly insulated jacket. Synthetic insulation is the practical choice for skiing: it keeps insulating when damp, dries fast and is easy to wash. Our waterproof insulated ski jacket takes this approach, with enough fill for cold lift rides and zip vents for warmer afternoons. Whichever you choose, the jacket is only the outer layer. What goes under it matters as much, as we explain in our layering guide.
3. The ski-specific details that matter
These features separate a ski jacket from a general winter coat. None of them is a gimmick. Each solves a problem you will meet in your first week on snow.
- Helmet-compatible hood. Large enough to go over a helmet, with adjusters at the back and sides so it moves with your head.
- Snow skirt (powder skirt). An elastic band inside the waist that stops snow going up your back when you fall or ski deep snow.
- Underarm vents. The fastest way to regulate temperature without stopping.
- Adjustable cuffs and inner wrist gaiters. Seal the gap between sleeve and glove.
- High collar with a soft chin guard. Your face sits here all day on the lift.
- Water-resistant zips or storm flaps. A standard zip is a leak.
Pockets you will actually use
A sleeve pass pocket on the left forearm means you never take your gloves off at the gate. Add an inner phone pocket (body heat protects battery life), a goggle pocket with a soft lining, and two zipped hand pockets. Chest pockets stay accessible when you wear a backpack.
4. How a ski jacket should fit
Always try a jacket on over the layers you ski in. Then run through these four checks:
- Arms up. Raise both arms overhead. The hem should still cover your waistband and the cuffs should still reach your wrists.
- Hug yourself. Cross your arms in front. There should be no tightness across the shoulders or back.
- Bend forward. In a ski stance, the back hem should cover the top of your pants.
- Hood and collar. Zip fully up with the hood on. You should be able to turn your head and see to the side.
If you are between sizes, size up. A little extra room holds warm air and leaves space for a mid layer on very cold days. Check our size guide for measurements.
5. Look after it and it will keep working
When water stops beading on the surface and the fabric looks dark and wet, the DWR finish needs reviving, not the jacket replacing. Wash the jacket with a technical cleaner (never fabric softener), then tumble dry on low for 20 minutes to reactivate the finish. If water still does not bead, apply a spray-on DWR treatment. Do this once or twice a season and a good jacket lasts for years.
Quick checklist: around 10,000 mm waterproofing or more, taped seams, insulation matched to how you ski, helmet-compatible hood, snow skirt, vents, a sleeve pass pocket, and a fit that passes the arms-up test.
See how our ski jackets and matching ski pants put this checklist into practice.
