Trusted by marine enthusiasts since 1967, the Igloo Marine Ultra boat coolers are packed with industry-leading features like stain and odor resistant material, UV inhibitors, and foam insulation with up to 7 days of ice retention. Built to withstand fishing trips, wet conditions, and sunny days, an Igloo marine cooler is the best ice chest to get the job done right. Capacity: 28 Qt / 26 L / 42 Cans. Ice retention: 3 days (tested under controlled conditions).