Nike Flex runner 3 - Green- 3.5 Big kids. Used. Smoke free home. An easy-to-pull-on design and grippy outsole make the Flex Runner a fan favorite. Made with playgrounds, recess and spontaneous games of chase in mind, this iteration has the stretchy bootie kids love with leather overlays for durability. A flexible outsole helps provide multi-surface traction, so kids are always ready to play. Slip into Fun A stretchy bootie design provides a snug fit while ensuring the Flex Runner 3 is easy to slip on and off. Made to Play Leather overlays work with a heel strap and reinforced toe tip to provide support and durability where kids need it most. Made to Move Foam wraps around the heel to help provide stability when kids quickly shift directions. To keep the foam outsole flexible, we added flex grooves throughout, helping every step feel natural. Multiple tread patterns help provide durable multi-surface traction. Breathable mesh keeps the shoe lightweight and helps little feet stay cool. Pull tabs on the heel and tongue help make the shoe easy to take on and off.