This hat is so perfect for those summer days when you need a hat that won't make you hot but will keep your pretty little head protected and the sun out of those peepers. Made from 100% cotton. The main part of the hat is only one layer of thin cotton so that you stay cool and breezy but don't worry, there are no open seems inside. In the back you have a leather adjustable strap that makes this hat fit heads from 23"-21" . If you need a custom size just message me, it's no problem. Accent button will vary from hat to hat slightly since all my buttons are re-purposed or vintage.