This Boonie stands out from the others, offering a sleek, lightweight design while offering 50+ UPF sun protection from its wide brim, and cooling ventilation from laser-cut holes that make the Boonie a great warm-weather performer. There's Spandex in play, too, providing more stretchability. Drawstring adjustability lets you perfect the fit. Fit & Design: Wide brim Drawstring adjustability Laser cut holes for ventilation Technology: 50+ UPF Sun Protection Additional Details: