Fall & Winter Looks For Imogen

Imogen: Hi I was wondering if you could help me..I live in Nyc and fall is fast approaching..looking for a warm but stylish coat but I can't seem to find anything I like and I've searched quite a few sites. Any ideas? I like dainty coats with feminine silhouttes..not a huge fan of bulky coats especially on a crowded subway but idk how to obtain warmth whilst still looking chic..any help is much appreciated