Adidas Springblade Nanaya Women's Running Shoes - SS16 Textile Sock-like Upper - For a comfy and snug fit. Synthetic Overlays - For added support and stability. POWERBAND CHASSIS - Delivers extraordinary lateral stability. springblade's Individually Tuned Energy Blades - Harness and release more of your energy in every stride. Women's Specific fit - For a sports specific fit.