best price mattress store in trichy growell beds and furnitures An orthopedic PU (polyurethane) foam single mattress is designed to provide optimal support and comfort for individuals, particularly those with orthopedic issues such as back or joint pain. These mattresses are made from polyurethane foam, known for its supportive and durable characteristics. Here’s an overview of the features, benefits, and considerations for an orthopedic PU foam single mattress: