Warm jackets: smart insulation on the trail

Cold conditions call for more than just keeping going. With the right warm layer you avoid cooling down during a break or on a windy summit, and you save energy for the rest of your outing.

Down jacket: maximum warmth when standing still

A down jacket gives the most warmth per gram and packs compactly in your backpack. Ideal for breaks, summits and real cold. While running you quickly get too warm in it, and wet down insulates poorly.

Insulated jacket: warmth that moves with you

Synthetic insulation or fleece stays warm when damp and breathes better than down. That makes an insulated jacket the layer for running and hiking in the cold, as an outer layer or under your rain jacket.

Insulated vest: warm core, free arms

An insulated vest keeps your core warm and leaves your arms free to move and vent. Great on steep climbs and for runners who warm up quickly.

Which one when?

• Down jacket → standing still, breaks, extreme cold
• Insulated jacket → running or hiking in cold, windy conditions
• Insulated vest → chilly days, high intensity, extra layer under a shell

Frequently asked questions

Can I wear a down jacket while running?
Only at low intensity or in extreme cold. While running, an insulated jacket or vest is usually more comfortable.

Are warm jackets waterproof?
No, most are water-repellent at best. In real rain, pull a rain jacket over your warm layer.

Do I need several warm layers?
Not always. Many trail runners combine an insulated jacket or vest on the move with a down jacket for breaks in the mountains.

Smart combinations

• Combine with a layering system of shirt and mid layer for the best temperature control
• Bring a rain jacket when rain is likely

Stay warm without compromising on comfort. Choose the right insulation and be ready for every cold trail.