"An active, feature-packed hat built with cooling fabric that’s activated by sweat or water to stay 30 degrees below body temperature for up to two hours; mesh-lined interior panels promote airflow. It includes a pocket for small items, a strap with loops for accessories, and a removable chin strap for a tighter fit. One-size-fits-most with some stretch; extremely soft and flexible so it packs into compact bags or larger pockets. The Details: One size | Polyester | UPF 50." - Jasmine Gomez Jasmine Gomez Jasmine Gomez is a commerce writer at Travel + Leisure, where she tests and writes about must-have travel essentials. She has over five years of experience producing lifestyle shopping content, and has tested dozens of backpacks, on-the-go outfits, travel accessories, and more on her own travels. Travel + Leisure Editorial Guidelines