In 870 BC an Assryan King used animal hides to help his armies float over a moat.
Herodotus of Halicarnassus, the Greek historian had ideas about cork being added to boats to help them float.
Emile Gagnan made the first life vest of cork, for emergencies.
Inuit understood that if you fell into the icy cold water you would drown, so they made life vests out of seal skins and guts.
Captain John Ross Ward made the first official life jacket for the Navy.
Cork became the main ingredient in all lifejackets.
Self Righting life jackets became a standard for the Coast Guard.
It became a law that all boats had to have enough lifejackets for passengers on-board.