Nike Women's Sprint Sister MidInspired by Nike's 1979 women-only track spike, the Nike Sprint Sister II is a recommended for casual everyday wear. The 2006 Sprint Sister is built on a new last; this shoe focuses on shape and fit while being engineered specifically for the street. The sleek outsole on this street-legal shoe provides comfort and flexibility even as the stitching and material textures provide a casual, but polished appearance.