Is this jacket warm enough for deep winter?

The cotton padding and fur lining are built for cold months, and the hood adds coverage. It suits typical winter cold better than extreme wet or sub-zero conditions, where a down or technical shell does more.

No. The cotton-blend shell resists wind and light chill but is not a waterproof membrane. In steady rain, expect it to soak through over time.

How does it compare with a down puffer?

It is warmer-feeling and dressier thanks to the fur lining and structured cut, but heavier and less packable. A down puffer wins on weight and compressibility; this jacket wins on look and lining comfort.

What should I wear under it?

A base layer and a light sweater are enough for most winter days, since the lining and padding already trap heat. Skip heavy knits if you run warm.

How should I care for the fur lining?

Follow the care label; cotton-shell jackets with faux or real fur linings usually need gentle washing or professional cleaning, and the lining should be kept from high heat so it stays soft.