Common materials include 100% polyester and 100% organic cotton; many listings use one of these two fabrics.
Brim lengths typically range from about 1 inch up to about 2.68 inches. Crown heights in listings range from about 1 inch up to about 6.75 inches.
Care instructions vary by item. Many listings recommend hand wash and line dry or lay flat to dry; some list machine wash and tumble dry.
Closures shown include pull-on styles, easy-close fasteners, back pushlock and back snap closures, and adjustable hook-and-loop (Velcro) backs.
Listings commonly show lightweight and midweight fabric types. Care instructions vary: many items note hand wash and line dry or lay flat to dry, while others list machine wash and tumble dry.