Men's Nike Metcon DSX Flyknit Training Shoe - FLEXIBILITY AND SUPPORT FOR HIGH-INTENSITY TRAINING. Designed to be lighter than the Metcon 3, Men's Nike Metcon DSX Flyknit Training Shoe features Flywire technology and a drop-in midsole for a stable feel while lifting and running. Flyknit upper delivers lightweight flexibility. TPU yarns are knit into high wear areas for durability. Molded flex grooves allow natural range of motion. Low-profile heel clip rolls up on the lateral and medial sides to help minimize drag during wall exercises and handstand pushups. Drop-in midsole is firmer in the heel for stability, yet softer and more flexible in the forefoot to provide comfort and cushioning for your footstrike when running. Firm rubber in the heel provides durability and a stable feel for high-intensity intervals. Sticky rubber in the forefoot offers excellent traction. Thin web rubber in the midfoot wraps up from the outsole onto the upper to help protect from abrasion.