Under Armour Men's UA Speedform&iquest; Gemini 100% Mesh Imported Synthetic sole Speedform Technology - Delivers zero distraction while running. Seamless Heel Cup - With a foam collar provides a locked-in, anatomical fit, keeping you comfortable. Smooth, Ultrasonic Welded Seaming - For next-to-skin support and comfort. Perforated Upper - For durable breathability. Molded 4D Foam Footbed - Conforms to your foot's exact shape, eliminating slippage.