A Bonnet*, also known as a Bunnet, Flat Cap, Sixpence, Scally Cap, Ivy Cap, Golf Cap, Derby Cap, Irish Cap, Tweed Cap, Salmon Hat, UNION Cap, Dai Cap, Jeff Cap, Windsor Cap, Touring Cap, Driving Cap, Skid Cap, Smack Hat, or Newspaper Cap. It is a rounded men's cap with a small stiff brim in front.
Cloths used to make the cap range from Original Wool, tweed (most common) to cotton driving caps for summer wear, sometimes featuring air vents. Less common materials may include leather. Cord flat caps are also worn in various colors. The inside of the cap is usually lined with silk for comfort and warmth.
The style can be traced back to the 14th century in United Kingdom and parts of Italy, when it was more likely to be called a "bonnet", which term was replaced, except in Scotland, by "cap" before about 1700. When Irish and English immigrants came to the United States, they brought the flat cap with them. This style of cap is also referred to in some parts of the UK as a cheesecutter cap because of its wedge shape. After the popularity of the films Goodfellas and Casino, this hat has sometimes been referred to as a "Joe Pesci" hat.