This sun hat will keep you shaded and cool during the summer! The top is well ventilated to allow air flow, keeping your head from getting hot and sweaty as it would in leather or suede hats. The shell is a hard canvas material that looks beautiful decorated with acrylic paint. This specific style is called "explorer". It's similar to fedora, but the brim is slighty different. Inside is an elastic band that will provide a great fit most head sizes. Size Chart Medium (recommended for sizes 56-57cm) Large (recommended for sizes 58-59cm) X-Large (recommended for sizes 60-61cm) If you do not see the size or color you'd like to order available, email contact@freebirdrevolution.com and we can place a custom bulk order for you. It will take a few weeks to arrive because they are made to order in Mexico.