This hat is not your average sun fedora. It offers sophistication and performance that you won't find in your average run of the mill hat. Its integrated crown support, lightweight design and distinguished brim shape give the hat a crisp, classic look and comfortable fit. The Sunday Afternoons(R) Charter Hat is functional, protective and will keep you sheltered from the sun on your long days outdoors! FEATURES: UPF 50+ Sun Protection Semi-circular brim with floatable foam core Brim and crown shaping wire Slipstream venting along exterior headband Water repellent / stain resistant Style: VCH SIZE CHART: Fit the hat slightly above eyebrows and ears to allow front and peripheral vision Measure your head by circling the crown of your head with a string or dental floss(around eyebrows and ears); use a ruler to measure the string Size Medium: 22.5"-24.25" Size Large: 23.25"-25"