Under Armour Cap, Men's, Size: M/L, Wham blue

Amazon

ArmourVent Technology delivers ultimate breathability in a light, stretchy, durable & fast-drying fabric Iso-Chill sweatband helps disperse body heat, making it feel cool to the touch Stretch construction provides a comfortable fit UA Classic Fit: pre-curved visor & structured front panels that maintains shape with a low profile fit

Zalando

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. Sale | Outer fabric material: 100% polyester | Sale order at Zalando UK! Size: M/L. Color: Wham blue. Pattern: plain.