Men's Nike Free X Metcon 2 Training Shoe - Black - Low-top sneakers IDEAL FOR BOOT CAMPS AND STRENGTH TRAINING. The Nike Free X Metcon will take you from a short run to your gym workout. Superior breathability and comfort combined with durability and response make this stable trainer perfect for even the most ambitious of fitness goals. Benefits Lightweight fabric is extra durable in high-wear areas. Midfoot cage locks your foot in place without restricting movement. Rubber wraps up the sides to help resist abrasion during rope climbs. Foam midsole has a firmer foam carrier for comfortable cushioning where you need it and stability for heavy weightlifting. Deep grooves along the outsole allow the shoe to flex and expand in every direction for a lightweight feel as you train.