The most comfortable Metcon to date, the Nike Metcon Flyknit 3 delivers the flexible breathability of a Flyknit upper with an updated collar for comfort. Its drop-in midsole works in tandem with firm rubber in the heel to provide durability and stability for high-intensity intervals. Product Features Flyknit upper delivers durable, yet lightweight flexibility. Stretch-woven sleeve provides a sock-like fit. Firm rubber in the heel provides durability and stability. Synthetic overlays in high-wear areas such as the toe and lateral side enhance durability. Molded flex grooves in the forefoot allow your foot to move naturally.