The revamped Under Armour Speedform Gemini 2.1 running shoes provide zero-distraction running with a smooth fit and seamless transitions. Updated colors bring new life to the shoes with Bemis tape and a next-to-skin fit. Runners will enjoy the responsiveness and flexibility of their longest runs. Upper: Smooth, ultrasonic welded seaming with Bemis tape offers next-to-skin support and comfort. Dual-color mesh provides exceptional breathability Midsole: Embedded sockliner within cavity of midsole delivers added cushioning, moisture wicking, and seamless comfort. ArchForm offers additional support and soft cushioning inserts at the arch and heel for an even better fit and feel. Dual-layer midsole combines Charged Cushioning on top of Micro G® foam for an optimum blend of cushioned support and explosive responsiveness.Outsole: Blown rubber outsole with carbon rubber heel is lightweight but incredibly durable. Anatomically placed flex grooves allow an optimal heel-to-toe transition for a smoother ride.