The navy Kangol Tropic 504 cap is made of comfortable and durable polyester blend material that is perfect to complement or add a fashionable edge to your wardrobe. The Kangol Tropic 504 cap in navy blue size large features a 504 shape in tropic material without the ventilation design and is rare in the US market. In past seasons this cap was offered to the rest-of-the-world but not to the US market. You asked for it and here it is; the popular 504 shape in tropic material without the ventilation design.