A below-knee (BK) prosthetic leg with a liner and carbon foot is a lightweight, high-performance artificial limb that uses a custom socket, a soft inner liner for comfort, a pylon (shin tube) often made of carbon fiber, and a dynamic carbon fiber foot for efficient energy return, providing stability, a natural gait, and durability for active lifestyles. This setup offers superior comfort and function compared to basic prosthetics, with the carbon foot adapting to surfaces for better traction and shock absorption, making it ideal for daily life and sports.