With built-in ventilation and UPF 50 sun protection, RedHead® Built Cool Boonie Hat is a great sun hat. Toss in the attached lightweight neck shade and it's that much better. But the real magic happens when moisture enters the scene. Built Cool technology means that as soon as it gets wet, the moisture-wicking, instant-cooling power of evaporation kicks in to combat the heat. Dampen the crown for a burst of cool whenever you need some additional relief. Our 100% polyester cooling hat also features a padded band for long-wearing comfort and an adjustable chin strap to keep it from blowing away. Imported.