From the manufacturer

Men's UA Blitzing Adjustable Hat

Even our hats are built to make you better. Built-in HeatGear sweatbands wick sweat to help keep you cool. Stretchy materials breathe as you work out to keep you comfortable and focused. That's what hats for athletes do.

• Sweat-wicking, textured knit fabric is super-soft for all day comfort
• Built-in, stretchy elastic sweatband wicks away sweat to keep you cool & dry
• Adjustable hook & loop closure
• UA Free Fit: pre-curved visor & unstructured front conforms to your head for a sleek, low profile fit