Felt round hats- suitable for pirates, musketerrs and medieval as well as LARP. Can be provided cocked with one or more sides up or plain. Can also be 'weathered' with tears that have been repaired and cuts- even patches of stockholm tar if desired!
 
Pirate re-enactors- if you want 'authentic' then cocked is fine, tricorn hats simply did not exist until after the Golden Age of Piracy!