Is duck down warmer than a synthetic puffer?

For its weight, yes. Down traps more heat per ounce than polyester fill, so a down parka is usually warmer and packs smaller. Synthetic fill keeps insulating when damp, which down does not.

Can I wear it in rain or snow?

Light snow is fine, but down clumps and loses loft once it soaks through. In steady rain, wear a waterproof shell over it or choose a synthetic-filled jacket.

How should I wash it?

Use a down-specific detergent on a gentle cycle, then tumble dry low with dryer balls until fully dry. Break up clumps by hand as it dries so the down regains its loft.

What is the fit like?

It is a regular fit with long sleeves, cut to layer over a sweater without feeling tight. Size up if you plan to wear bulky knits underneath.

Does the hood come off?

No. The hood is attached, so it stays with the jacket at all times.

What should I check before buying?

Confirm the down fill power and the shell fabric, since those drive warmth and weather resistance. Check whether the cuffs and hem adjust, which this one does not list.