Iconic Kangol classic, clean and crisp. The 504 cap gets its name from the number assigned to the original block shape that it is made on. Tropic yarn is Kangol鈥檚 traditional polyester blend, warm weather yarn that has been a staple in the collection since the 1950's 92% Polyester, 8% Acrylic Not Washable Tropic 504 0287BC 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.