In addition, nike free run 2 technology has been widely applied to training shoes for men, such as Nike Free Haven, which adopts the Free 3.0 technology, and it provides a variety of elasticity and comfortable feeling of close to earth and the barefoot-like training feeling. Any of Nike training shoes for women utilize the free technology as well, including Nike Free advantage, Nike Free gym, Nike Free tr fit 2, and nike free run 3. With this technology, the wearer can enjoy the flexibility, and the balance in both inner-door and outdoor activities.