Men's Best Soft Duckbill Cap. This wool fleece cap, adjustable side buckle. Other names for this duckbill cap are: ivy caps, duckbill caps, Gatsby caps or newsboys, this hat has an distinguished look to any man’s wardrobe. 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. Delivery: 14-24 days.