Choose coat insulation for the weather and care conditions you expect. Down is valued for warmth relative to weight and packability in dry cold, while synthetic insulation can retain warmth when damp, according to Patagonia's product guide. Compare fill details, shell, fit, hood, coverage and care together; fill power describes down loft per weight and is not a complete warmth rating for the finished coat.
Choose coat insulation for the cold and moisture you expect, then compare the full garment. Down is valued for warmth relative to weight and packability in dry cold; synthetic insulation can retain warmth when damp. These are broad material tradeoffs, so check the exact coat’s insulation, shell, fit and care.
Down and synthetic insulation
Down insulation can suit dry cold when lower weight or packability matters. Compare fill power, fill amount, baffle construction and responsible-sourcing information. Check whether you can clean and dry the coat as the maker specifies, and consider that performance can be affected if down becomes wet.
Synthetic insulation can suit damp conditions or easier wet-weather handling. Compare insulation type, amount, distribution and shell protection. Check whether the maker’s care routine suits repeated use and drying; synthetic fill varies by construction, density and brand.
Patagonia explains that fill power measures the volume one ounce of down occupies; a higher number indicates more loft and insulation potential for the same weight. It does not describe the complete coat by itself. A high fill-power label cannot substitute for checking how much insulation is used, how it is distributed, the fit and the coat’s intended conditions.
Choose by your real winter use
- Mostly dry cold: Compare down coats by fill power, fill amount, coverage and how compressible you need the coat to be.
- Wet or changeable weather: Consider synthetic insulation or a coat whose shell is designed for the conditions; verify the manufacturer’s weather claims and care directions.
- Commuting: Look at hood adjustment, cuff closure, length, pocket access and whether the coat layers comfortably over work clothes.
- Outdoor activity: Balance insulation, mobility, venting and shell protection for how hard you move and how long you stay outside.
- Easy maintenance: Read washing and drying directions before purchase. Some coats require careful cleaning and complete drying to preserve their loft.
Try the coat over the layers you normally wear. Check that you can reach, sit and move without binding, and that the hem and sleeves cover the areas you want protected. If buying online, compare the garment measurements with a coat that fits and review the return terms.
Our clothing fabric guide explains fiber labels. Browse the women’s clothing category for more wardrobe guides.
Official reference
Common questions
Is down or synthetic insulation warmer?
Neither is automatically warmer in every coat. Patagonia describes down as well suited to dry cold and lightweight packability, while synthetic insulation can retain warmth when wet. Compare the complete garment and conditions.
What does fill power mean in a winter coat?
Fill power describes the volume an amount of down occupies. Higher fill power can provide more loft for the same weight, but coat warmth also depends on insulation amount, construction, fit and weather protection.
Is a down coat a good choice for wet weather?
Down performs best when it stays dry. For frequent wet conditions, compare synthetic insulation or a coat design with weather protection that suits your climate and the maker's care instructions.