Under Armour Custom AirVent Baseball Hats

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.

Under Armour Men's ArmourVent Adjustable Hat

Custom Under Armour Bucket Hats

Hammes Notre Dame Bookstore Apparel, T-Shirts, Hats and Fan Gear

UAB421-Airvent-Performance

Women's Under Armour White South Carolina Gamecocks Team Airvent Performance Adjustable Hat

Airvent-Performance-Series

Men's Under Armour White Notre Dame Fighting Irish Logo Performance Adjustable Visor

Men's Under Armour White Notre Dame Fighting Irish Airvent Performance Flex Hat

Under Armour Custom Visors

Notre Dame Fighting Irish Under Armour Airvent Performance Flex Hat - Green