A mariner cap, also known as a Greek fisherman's cap, has a soft, flat-crown with a small, stiff peak brim and is often decorated with a cord or braid trim above the brim. The cap's design is inspired by traditional headwear worn by sailors, fishermen, and seafarers, giving it a classic, nautical look. Chose cotton or linen for the summer and wool for the winter to have year round style.