A trucker hat is a type of baseball cap. Instead of being made of cotton fabric, half of the hat is foam (in the front), and half plastic mesh for breathability in the back, although their design is otherwise the same as a baseball cap. However, their fashion is very different from a baseball cap, and trucker hats have made a re-emergence, along with aviator sunglasses, thanks to celebrities such as Ashton Kutcher, Pharrell and Johnny Knoxville. Instead of displaying the logo of a sports team, they will often have witty and/or graphic designs on them...
often in a vintage style. Aside from the traditional foam-and-mesh style, a considerable number of trucker hats have a mostly-fabric construction while retaining their more "square" appearance when compared to a standard baseball cap.