Marine Foam (Flexa): The Ultimate Boat Seat FoamFlexa Marine Foam is the ultimate foam for superior comfort and is perfect for boat seats, golf carts, restaurant booths, and hundreds of other projects. This premium marine foam is a durable, high quality foam specially formulated for high traffic applications. Flexa Marine Foam is antimicrobial to help prevent mold and mildew making it perfect for both indoor and outdoor use. Get the most out of your marine experience with Marine Foam Flexa.