Featuring the lowest profile outsole, the Free 1.0 Cross Bionic truly allows you to feel the ground below you. The Cross Bionic is ideal for high intensity workouts including boot camps, kettle-ball exercises, kickboxing and interval training as it offers lightweight support and stability along with a great deal of foot control. The hexagonal groove outsole allows the foot to move more naturally in each direction while providing the traction and grip needed for the most grueling workouts.