A trucker hat is a type of baseball cap. It is also sometimes known as a "gimme cap" (as in "give me") or a "feed cap", because this style of hat originated as a promotional give-away from feed or farming supply companies to farmers, truck drivers or other rural workers. "Trucker Hat" is the more common name for the hats worn as popular celebrity fashion items, while actual truckers or farmers would more likely call the hats "gimme caps" or "feed caps".

The design of a trucker hat similar to that of a baseball cap, with a slightly curved bill in front, joined triangular sections forming the hat, and a button on top. Instead of being made of cotton fabric like a typical baseball cap, the front section of a trucker hat above the bill is foam, and the rest is plastic mesh for breathability. The foam front of the hat stands up straight and stiff, which makes the trucker hat taller than most baseball caps. There is an adjustable plastic snap closure in the back to ensure that one size fits most.

The original feed caps bore company logos on the front foam section of the cap, either printed or as a patch sewn on. These companies typically had a rural clientele – such as the local feed store or John Deere tractors. Trucker -style hats can now be found with other pictures, logos, flags, camouflage, or humorous sayings on the front. Trucker hats are still available as promotional items.