Rubber sole A breathable, lightweight upper has a comfortable, sock-like feel with a 7/8-length inner sleeve and provides easy entry. The wide heel creates a solid base for lifting. A softer foam core cushions your foot, while a firmer outer layer is durable and stable. Nike Free technology in the forefoot creates flexibility for agility moves like burpees, planks and sprints. Molded heel clip offers support. Webbing eyelets offer dynamic containment. When your workouts wade into the nitty gritty, the Nike Free Metcon 5 can meet you in the depths, help you dig deep to find that final ounce of force and come out of the other side on a high. It matches style with substance, forefoot flexibility with backend stability, perfect for flying through a cardio day or enhancing your agility.