Care varies by item: some list hand wash and line or lay flat to dry, while others permit machine wash and tumble dry—follow the specific product label.
Brim lengths range from 0 inches (the trapper) up to about 2.75 inches for trucker/twill hats; crown heights reported across listings range roughly from 2.25 to 9.25 inches.
Several trucker-style hats list a breathable mesh back for airflow; at least one listing explicitly notes there is no UPF rating provided.
Most listings are sized for kids or youth (including a youth one-size-fits-most option), and one listing is specifically for toddler sizes (12–24 months).
Trucker hats typically have a foam front and breathable mesh back with a plastic adjustable snapback, while the quilted trapper has a quilted exterior, a warm full lining, and a chinstrap secured with hook-and-loop.