There are few feelings less pleasant than the clammy clasp of a jacket with poor breathability. It’s no good being protected from the elements if you just end up getting drenched from the inside.
The key is getting the perfect winter cycling jacket to match your style of riding.
Breathability is measured by the number of grams of water vapour that can pass through a square meter of the material in a 24-hour period. A value of 10,000–20,000g/m²/24hrs tends to be fine for a steady ride, but if you are putting in some spicy efforts you’ll want to be looking in the range of 20,000–40,000g/m²/24hrs.
Get the breathability balance right and it will pay dividends in the comfort of your ride.