What materials are modern coolers made out of?

Modern coolers are typically made from a combination of materials, including high-density polyethylene (HDPE) for the outer shell, which provides durability and resistance to UV rays. Insulation is often made from foam materials, such as polyurethane, to enhance thermal retention. Additionally, some coolers feature stainless steel or aluminum components for added strength and a sleek appearance, while rubber or silicone seals ensure airtight closures.