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, while the stretchy design makes it easy to slip their foot in with a snug and secure feel. Not sure which size to order? Click here to check out our Kids’ Measuring Guide! For more helpful tips and sizing FAQs, click here .