WeighMaterial: Soft EVA foam (outer) and PE (Inner).ted Hula Hoop. It is specifically designed for exercise purposes and is great for burning calories, promoting fat loss, improving core strength and toning up areas such as your abdominal area and bottom. Material: Soft EVA foam (outer) and PE (Inner). Hula Hoops are covered with soft foam, to ensure you have the most comfort possible while you work out. Our hula hoops are ideal for both adults and teenagers.