help with identifying the hat Ansel Adams was wearing

Hello all,Sorry if this is not the best place for asking this but can you please help me identifying the hat that Ansel Adams was wearing? Here is a picture of him with the hat:http://bit.ly/2HI04DO want to buy something similar for a photographer friend of mine. Ansel Adams is a huge inspiration for him and I thought it could be a great present for his birthday.​Thanks a bunch and sorry again if this isn't the right place! via /r/photography http://bit.ly/2Rw8xcO