This hat was designed to keep your head cool by dumping excess heat through special vents that allow hot air out, but are small enough that the sun's rays aren't an issue. DNA DNA Curved brim, structured build maintains shape with a slightly higher crown ArmourVentTM Technology delivers true breathability in a light, stretchy, durable, fast-drying fabric Built-in HeatGear® sweatband wicks away sweat to keep you cool & dry Stretch construction provides a comfortable fit Specs Specs Style #: 1291857 100% Polyester Imported Fit & Care Fit & Care Regular