There are certain spring fashion staples that never go out of style—open-toed shoes, light cotton sweaters, sundresses—but one accessory that trumps them all is the formal sun hat.

And while it gets a slight update each season—maybe a different kind of trim or a new color—this iconic wide-brim hat is eternally synonymous with such traditional warm-weather events as the Triple Crown and May Day.

Giovannio Sin Specta navy and white hat ($169) at Hats in the Belfry.