Foam types are categorized based on their composition and intended use. Common types include memory foam, which conforms to the body for comfort and support, and latex foam, known for its durability and natural properties. Other types include polyurethane foam, often used in furniture and mattresses, and polyethylene foam, which is lightweight and used for packaging and insulation. Each foam type has unique characteristics that make it suitable for specific applications. For instance, high-density foam provides firm support, while open-cell foam is breathable and often used in soundproofing. Understanding these differences helps consumers choose the right foam for their needs.