Black and white are the main colors that define the overall appearance of the Nike Free Metcon 4. This shoe features a rubberized logo at the tongue. The upper is made of a combination of breathable mesh and synthetic materials, while incorporating Nike's Free technology in the sole unit. Additionally, it has a thermoplastic polyurethane heel counter. The outsole is constructed from durable rubber with a multidirectional tread pattern. Designed as a hybrid training shoe, it combines elements of the Nike Free running shoe line and the Metcon cross-training shoe line.