Is this coat warm enough for winter?

It is a light puffer, best for cool days and layering. In hard cold or wind you will want a longer, heavier coat or an extra mid-layer underneath.

How does the fit run?

The measurements suggest a compact, close fit: about 20 inches pit to pit and 25 inches collar to hem. Compare those numbers with a coat you already own rather than relying on the S label.

Where does the hem sit?

At roughly 25 inches from collar to hem, it lands around the hip. That is shorter than a thigh-length parka, so the legs stay uncovered.

Can I wear a sweater under it?

Yes, but the pit-to-pit width is the limit. A thin knit fits easily; a bulky sweater may feel tight across the chest and shoulders.

How should I wash a quilted puffer?

Follow the care label. Quilted puffers generally do best on a gentle cycle with low heat or air drying, and adding dryer balls helps restore the loft of the filling.