Carbon Fiber Foot Cover Realistic in appearance, durable and easy to wear, the Prosthetic Foot Cover provides excellent off-the-shelf cosmetic results for below-knee amputees. Available in a variety of skin tones, it features a new silicone formula for a more natural look. Prosthetic Foot Cover Realistic in appearance, durable and easy to wear, the Prosthetic Foot Cover provides excellent off-the-shelf cosmetic results for below-knee amputees. Available in a variety of skin tones, it features a new silicone formula for a more natural look. Orosthetic foot cover is required for use with carbon fiber feet. We can customize the foot shell to your carbon fiber shape and size or other special requirements.