UA GINF Surge 4 AC The Under Armour Girls Infant Surge 4 AC Running Shoes in this Vivid Magenta with Black colourway. These shoes are going to feel cushioned and comfortable, but also light and breathable. Why? Because when you never slow down, that's what you need. Lightweight, breathable mesh upper TPU heel overlay for added durability & support Adjustable hook & loop strap closure for easy on & off UA Surge 4 AC Running Shoes Infant Girls These shoes are going to feel cushioned and comfortable, but also light and breathable. Why? Because when you never slow down, that's what you need.