the columbia sun ridge packable hat in navy/white is an example of beauty and function. aside from the great striped design the sun ridge keeps you cool with omni-freeze technology which reacts with sweat to lower the temperature of the material. this hat is totally packable making it the ultimate travel companion this summer.hat details:made of 100% polyesteromni-freeze technologysweatband for comfortpackable for travelembroidered columbia label sewn to brim13cm wide brim12.5cm high crownhat sizing info:small/medium - fits 54cm to 56cmlarge/x-large - fits 57cm to 59cm