Igloo Marine Ultra Square Coolers Easy to clean, durable cooler bag - anti-mildew, and UV protective Ultra thick insulation keeps content cold - 1.1-inch thick extruded closed cell foam keeps ice up to 2 days Non-corrosive hardware made to survive harsh marine conditions Leak resistant, easy to clean, antimicrobial liner is both stain and odor resistant, and is an incredible .35mm thick PEVA