PF Ankle Straps: Rome ankle straps are constructed with a layered approach where we start with soft, conformable layers close to the boot and progressively increase to stiffer ones furthest away from the foot. The result is a flex that is initially soft, but quickly steps up to support as the layers interact with each other. In the Targa, a 3-layer system where each layer is structurally independent of the others maximizes the feeling of Progressive Flex.