That’s right, most of our fabric hats have Bloom Algae Foam inside of the brims and some crowns. So instead petroleum based foam we use Bloom Foam that is made from cleaning algae blooms that pollute fresh water and turned into usable foam for many types of products including our hats. You may not see it, but it is there and goes with one of our slogans “ It’s what’s on the inside that matters”.>> You can find out more hereHats made with Algae