The Women's Vimhue X-Boyfriend UPF 50+ Hat is a must-have for every outdoor activity. From golf to tennis, the Vimhue X-Boyfriend hat is a girl's best friend. The women's specific fit and cooling fabric ensure all-day comfort. Plus. UPF 50+ keeps your head protected from the sun. One of the fan-favorite features of the Vimhue X-Boyfriend is the X-back opening that accommodates a variety of ponytail heights. Wear your hair however you like in the sleek and comfortable Women's Vimhue X-Boyfriend UPF 50+ Hat.