Under Armour Speedform Fortis Night Women's Running Shoes Synthetic-and-mesh UA SpeedForm technology - Delivers zero distractions while running. Seamless heel cup with cushioned collar - For a locked in and anatomical fit. Smooth welded seaming with Bemis tape - For support and comfort. Adjustable heel lock down strap - For improved fit. 360 reflectivity with reflective mesh upper - To improve visibility in low light conditions.