I wore a Diamondbacks hat to work and the Festival International office today. I bought this hat from Lids.com off of clearance in 2015. Made by New Era, it is size 7 1/4 and made of 100% polyester. I am a Diamondbacks fan, so I wear this hat often, especially during baseball season. I can’t find this hat for sale, I think it was a one off style for a particular year. I don’t even know the model/style name. New Era is the official on field hat manufacturer for Major League Baseball.