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Insulation

What are you planning to do? We'll find what suits you. Start the advisor ›Tips on choosing and care in our guide ↓

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Guide

Insulation

Choose synthetic insulation by pace: air-permeable designs suit movement, while a closed outer face limits draughts. Decide whether the jacket will sit beneath or over your shell.

Key points

  • Prioritise airflow on climbs and extra insulation for breaks.
  • Consider the filling and outer fabric together.
  • Check chest and hip room separately; a shaped cut is optional.
Man opening a touring jacket over a grid fleece.

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

Open the insulated jacket advisor ›

Which choice for which use?

UseYour choiceConsider
Brisk climbsYour choiceMore air-permeable insulationConsiderMay need extra wind protection
Cool walksYour choiceModerate insulationConsiderTry beneath your waterproof
Long stopsYour choiceMore insulation and closing openingsConsiderRelease heat early when moving again

What to look for

QuestionIn briefWhy
When will you wear it?In briefMoving or restingWhyThick insulation can be too warm during hard effort even in cold weather.
Where is the insulation?In briefCompare constructionWhyHybrid designs may insulate the torso and sleeves differently.
Over or under your shell?In briefTry the combinationWhyThe necessary fit depends on the order of your clothing layers.

Frequently asked questions

Is synthetic insulation waterproof?

No. The filling and the rain protection of the outer fabric are separate properties. Sustained rain needs an explicitly waterproof construction or an additional shell.

Can I wear it uphill?

If its warmth and airflow suit your pace. Start with less insulation and use the front zip rather than soaking the inside with sweat.

Is the lightest jacket the warmest?

Weight alone does not describe fill quantity, cut or wind protection. Compare intended use and construction instead of sorting unrelated models only by grams.

How do I care for the filling?

Wash and dry according to the care label. Store it dry and avoid leaving it tightly compressed unnecessarily; a small stuff sack is mainly for transport.

How much does an example weigh?

For example, Jack Wolfskin lists Jack Wolfskin Heidelstein 2 INS Jacket W at 690 g. Compare weight figures only when their reference sizes match.

How do I check the fit?

Check chest and hip room separately rather than judging fit only at the waist. Raise your arms and sit down: sleeves and hem should stay in place. A shaped or cropped cut is a choice, not a requirement; it must suit your body and other layers.

Last updated: October 2026