Yes — this is a cotton-wadded coat, not loose down or synthetic fiberfill. Exact fiber percentages aren't published by the maker, so check the sewn-in label when your coat arrives.
The silhouette is relaxed through the shoulders and body, but the detachable tie belt draws in the waist so you can wear it straight or shaped — your call, every day.
Below the knee — around mid-calf on average heights, and closer to the ankle if you're petite.
A gentle cold machine cycle or spot cleaning works well; hang it to dry so the cotton wadding keeps its shape. No ironing needed — the quilting bounces back on the hanger.
Yes. The coat is designed to be worn either way — belted for a defined waist or open for a relaxed, straight silhouette.