With the hot and humid weather often comes unwanted frizz and other hair woes, but a summer hat can change all that. Light and airy, these straw and cotton head coverings are the quickest way to get some shade while still looking chic. We picked the best pieces of the season, from floppy beach hats by Tommy Hilfiger and J.Crew to cute fedoras by rag & bone and Roxy, all to keep heads cool and hairdos nicely covered.