Nike Flex Runner 3 Sneaker - Toddler Size 8 ✨New in box✨ The Nike Flex Runner 3 sneaker is for the kid on the go who loves to play all day, from gym class to a sprint down the block. They're lace-free, meaning super quick to slip on and off. A stretchy bootie design makes it easy to slip their foot in with a snug and secure feel. A heel strap and leather on the sides stabilize the fit.