Abstract: Features for a high performance prosthetic foot are provided in a package suitable for use with Symes and reverse-Symes amputees. The foot has a very low profile despite incorporating ankle-type torsional features complete with biasing. Other optional features are presented by way of a dual-rate padding spring system, that convincingly allow for both walking and running (together with related tasks like jumping) by way of a single prosthetic setup. Additional features may be provided in the padding springs directed toward more natural foot movement and response. The foot may be provided alone, in connection with a prosthetic socket and be bare or encased in order to appear more natural.