Girl's Sneakers Nike Flex Runner 3 Sneaker Size 9C Laser Fuchsia/Black. My daughter wore these sneakers one time. The Nike Flex Runner 3 is perfect for playful kids on-the-go! With a stretchy bootie design, flexible outsole, and grippy traction, these running shoes make it easy to keep up with all the action. And with no laces to worry about, they'll be ready to race in no time!