Unfortunately I can't give details of the actual event but I have an invitation to attend a fairly high profile event during the daytime next month. The invitation States 'smart casual' and advises that it will take place on grass. A hat is not necessary but goodness me what shall I wear....I am so excited about going and want to look good but also don't want to freeze...I do feel the cold terribly. I'm 5'5" and not over weight but do have big boobs.....help