The under armour womens speedform fortis running shoes use a ua speedformconstruction to eliminate distractions while running and allow you to fully focus on your performance a seamless heel cup with a cushioned collar provides a secure fit while ultrasonic welded seaming provides support and comfort at the midsole full length micro g foam offers an incredibly lightweight and responsive ride while the charged foam layer is cushioned and responsive 4d foam in the sock liner gives a plush