From the Paramount website: This Pintail Pair Duck Hat is on our Riverside 6-Panel hat style features our exclusive waterfowl duck print. Coupled with a structured front panel and mesh back. Additionally, our COMFORT SNAP™ elastic snapback closure which combines the stretch fit of a custom cap with the adjustability of a snapback. Lastly, this pintail pairduck hat features American Fit™ sizing which fits men's head sizes MD - XX. RIVERSIDE 6-PANEL Mesh back Style with structured front panel STRUCTURED design in waterfowl duck print COMFORT SNAP™ rear closure couples elastic stretch with adjustability of a snapback AMERICAN FIT™ sizing fits men's head sizes MD - 2X ONE SIZE FITS ALL