Meet the hat you can wear on the beach and during a night on the town, with the right summer vibes. This Tommy Bahama hat features an Elasticized COOLMAX® Sweatband, this makes it really comfy! the hat fits just right thanks to the elasticized band, easy to size in Small/Medium or Large/Extralarge. To select a size just simply go with the shirt size you wear unless you know you have a bigger or small than average head.