They are designed for seniors or persons with decreased balance, strength and endurance. They are often used by people recovering from hip, knee, leg, ankle or foot fractures or surgeries. The majority of Folding Walkers are made of tubular aluminum or plastic, some heavy duty models have steel parts. The walker has 4 legs with rubber tips for increased traction. The top of the walker has 2 handles to provide comfortable use. They are lightweight and can be folded to fit into the trunk of a car.