Wikipedia
A sailor hat is a brimmed straw hat similar to those historically worn by nineteenth century sailors before the sailor cap became standard. It is very close in appearance to the masculine boater, although "sailors" as worn by women and children have their own distinct design, typically flat-crowned, wide-brimmed and with a dark ribbon band extending into streamers hanging off the brim. Such hats could also be made in felt as an alternative to straw.
Usage examples of "sailor hat".
Nasty Chobb came running by, wearing an English sailor hat with H.
The band on my sailor hat came from Gretchen Scheffler's grab bag.
A sailor was with her and she was wearing his white sailor hat on the back of her head.
At least, the big visitor had a little white sailor hat perched on the back of his thatch of dark, curly hair.