Cotton, efficient sweat-absorbing hats, this unisex baseball cap is perfect from long days out on the water to casual days outside. Usually, you do not do well in heat and humidity and usually do not play golf in it, but this cap with fan helped immensely. With it, you can work outdoors comfortably instead of sweating. The baseball cap with a USB cable, you can use the power bank to charge the fan at any time when no electricity. The fan can be somewhat speed controlled from low or high, the lowest speed can be used for 2 hours, and the hight speed can be used for 1 hour.