Prosthetic devices are not made for the level of motion or activity swimming and diving requires and the attachment of a transitional swimming fin can cause pain and discomfort. An AMP Fin™ custom molded fin is designed to wear on the residual limb. Wearing the custom molded AMP Fin™ directly on the residual limb can increase force and mobility. For those users who are not good candidates for a custom fin, the mechanical fin attaches to the user’s current prosthetic socket. The benefits of the mechanical fin are very much the same, allowing for the user to participate in aquatic sports/therapy in a safe manner.