A sailor hat, also known as a navy cap or dixie cup, is a type of headwear traditionally worn by sailors in the navy. It is typically made of white cotton or a similar fabric and features a flat, circular top with a wide, stiff brim. The hat often has a black ribbon around the base, which can be tied in a knot at the back. The design of the sailor hat is practical, providing shade from the sun and helping to keep the head cool. It has become a popular fashion accessory beyond the military, often seen in nautical-themed clothing and costumes.