The series of Nike Free are divided into the diverse levels due to the diverse states of feet of different individuals. 0.0 introduces a barefoot running and 10.0 is equivalent to the suppleness of the average running shoes like Nike Zoom Vomero. Nike free brings three sorts of Nike free running shoes for the consumers. The designers develop the designs of midsoles of these shoes and make the shoes turn out to be stunning. In addition, the new seamless design gives a sensation of comfort and fitness. In the new Nike free series, Nike Free 3.0 V4 and Nike Free Run+3 appeared in the market during 2012. Simultaneously, the development team of Nike brought Nike Free 4.0 in June in the same year.