AO coolers are the best soft-sided coolers in the industry. They are guaranteed to never leak or sweat. Their high quality vinyl liner is the same material used to make waterbeds and above ground pools. The inner insulation is three-quarters of an inch thick, high-density, closed cell foam. This combination creates a cooler that will hold ice for 24 hours in 120-degree heat. It has a soft exterior and won’t scratch up your gel coat or tear up any upholstery.