Based on one 2015 short article, hair is naturally porous. However, hair which has sustained broken due to bleaching or chemical remedies is more porous than untreated hair.  Polar bears use their fur for heat and whilst their pores and skin is black, their clear fur appears white and presents https://brooksnwemt.illawiki.com/1629490/top_latest_five_hair_salon_in_ottawa_urban_news