The 504 cap takes its name from the number assigned to the original shape of the block on which it is made. Thanks to the Tropic yarn, the hat is both lightweight and comfortable. 65% POLYESTER, 35% MODACRYLIC; HEADBAND - 100%. NYLON. A flat cap that makes history. This Kangol classic offers inimitably comfortable summer styling. Lightweight, breathable fabrics meet timeless design - an unequalled composition! With embroidered Kangol logo.