The Nike Free come in 3.0, 5.0 and 7.0 being the extreme model.
I found a pair of 5.0 didnt like the fluro orange colour, but there the most comfortable shoes I have ever worn. I wouldnt have thought they would be a good lifting shoe though. I will wait and see what you think. If I find a pair in a better colour I might get some for casual wear.
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