W1-54-24 The Nike MetCon 4 is the product of intensive testing and collaboration from some of the world’s most elite training athletes. The next step in Nike’s MetCon series revolutionizes the design of past models in an attempt to create a more durable and more comfortable training shoe – and Nike believes they have done just that. The MetCon 4 features a rubberized TPU upper for increased durability. In terms of adding comfort, the new iteration utilizes a new forefoot cushioning for both the top and bottom of the foot as well as a more comfortable tongue. The response from top training athletes has been extremely positive in terms of both improved durability and comfort, and the brand is now ready to unleash its retooled silhouette on the market.