With the Flex Runner 4, you're always ready to race into fun. Its flexible, bootie-like design makes it easy to pull on, while stretchy straps help secure your fit. Flex grooves in the outsole let your feet move naturally, helping you find your stride. Design Elastic straps run behind the heel and across the top of the foot to provide a snug, secure feel Pull tabs on the heel and tongue work with a stretchy inner sleeve to help make these shoes easy to put on In-Shoe Comfort Soft, springy foam in the midsole helps cushion their every step Durability & Traction Multisurface traction works with sturdy foam that wraps around the heel to provide grip and stability when kids shift directions Flex grooves in the outsole add flexibility, helping every step feel natural Reinforced toe box anddurable materials throughout help these kicks stand up to how kids play