An inflatable liner for protective headgear comprising, in accordance with one aspect of the present invention, a reinforced hollow strip for the reception and storage of fluid, the strip having a selected size so as to line the protective headgear and partially encircle a user's head, a reinforced hollow...http://www.google.sh/patents/US5175889?utm_source=gb-gplus-sharePatent US5175889 - Inflatable liner for protective headgear
