iridescent visor

Common materials listed are 100% EVA (ethylene vinyl acetate), nylon, and nylon/spandex blends (commonly 90% nylon / 10% spandex).

Descriptions commonly list holographic and mirror-like finishes on the brim, including holographic vinyl and a holographic mirror finish; some designs also include confetti-filled elements for added sparkle.

Many are offered as one-size or standard fit. Fit is achieved either with a stretchy pull-on headband or with an adjustable strap and buckle so the wearer can personalize the fit.

Typical dimensions in descriptions show brim lengths around 2.5 to 2.75 inches and crown heights ranging from about 2 to 4 inches.

They’re marketed for leisure and outdoor use—pool, beach, river floating, sunny days, and sporting events—as well as party or themed events like bachelorette celebrations and other outdoor adventures.