Charged Cushioning delivers every advantage at once: energy return, impact protection and adaptive support for every runner Upper The upper utilises UA's innovative Speedform technology. This is a combination of smooth ultrasonic seams, a light and flexible two-tone mesh, and a moulded, seamless heel cup to create a zero distraction, precision fit that feels - and looks - fast. Midsole The Speedform Gemini 2 from UA combines a responsive, cushioned midsole with a flexible and lightweight upper to deliver a fast feeling, zero distraction shoe. A dual layer midsole combines Charged Cushioning on top of Micro G foam for the ultimate blend of cushioned support and explosive responsiveness. Shock is absorbed on impact by the Micro G foam layer, then energy is returned back to the foot by Charged Cushioning to create a responsive ride and an energised footstrike. Outsole Transitioning from heel strike to toe off is made much more efficient in the Gemini 2 with the use of anatomically placed flex grooves underfoot that flex with the foot for a smoother ride. Additional support and cushioning is provided with ArchForm and added cushioning inserts at the heel and arch for an even better feel and fit. Completed with incredibly durable blown rubber, lightweight traction allows for confidence in movement.