This Bombardier, Challenger 3500 Armour Trucker hat features light weight poly fabric with perforated mesh for ultimate ventilation. The UA Pro Fit includes a structured front panel that maintains shape with a higher crown for a modern fit. It includes a built-in sweatband that wicks away sweat to keep you cool and dry and the back has an adjustable snapback closure. This is not your grandpa’s trucker hat, although we like those too!