FLEX RUNNER 4 (GS) Asics Engineered mesh—stronger and more flexible

Engineered mesh—stronger and more flexible than regular mesh—improves hand feel and comfort

More Responsive Cushlon 3

breathable and made with at least 20 Percent recycled material by weightyou can’t go wrong with that

93% Polyester

The Nike Renew Retaliation 4 builds upon its predecessor with a stretchy midfoot strap designed to help keep your foot secure during cardio

FLEX RUNNER 4 (GS) Asics Engineered mesh—stronger and more flexibleNike Flex Runner 4 Big Kids' Running Shoes With the Flex Runner 4, you're always ready to race into fun. A 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. What's New You spoke and we listened. For the Flex Runner 4, we updated the fit of the midfoot strap and the collar to help make these easy to slip on and