If you are interested in barefoot running or the lightest, most minimal shoe you can find, then the line might be right up your alley. With a one-piece collar, a heavy focus on mesh on the upper and a segmented outsole, talking about 3 seires of shoes:
Nike Free Run
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nike free run 2
the Nike Free shoes is a great combination of light, flexible and breathable, which is a prescription for not just a good minimalist running shoe, but a good cross-training shoe as well. So, if you are looking to hit the gym for a fitness class or to work on some weight training on your cross training days.
Now, the Nike Free 5.0 V4. I really wanted to give the Nike Free another try as they were really first on scene with a minimalist sneaker, and they seem to get technology right if for no other reason than the ability to pour boat loads of money into research and development. The Free+ seems to have a bit more of a heel lift, and a bit more of weight than the Kinvara, and a totally different look and feel.