These are some cool lightweight cotton/polyester caps! Men's Patchwork Beret Style Duckbill Cap. Enjoy performing on stage wearing one of these colorful caps. Add one or both of these cool caps to your collection. Adjustable side straps. Other names for this duckbill cap are: ivy caps, duckbill caps, Gatsby caps or newsboys. With a rounded, low crown and a short stiff brim, these hats have been around for nearly 700 years. Flat caps are a symbol of the working man in Britain and soon became popular by higher class. Adjustable size: 21-1/2"-23-1/2" (55-60cm). Estimated delivery: 14-24 days.