Its purpose is to reduce

Very thin design is a lot of shoes high, delicate look to put on, but this is the greatest harm to the foot. Zhang Jianzhong said the repair ability of young people wearing such shoes one day, legs the night to recover. To the elderly on to die, it was a foot or even permanent pain after extrusion will continue. He suggested nike free 4.0 v2 womens black pink that the elderly can always adjust too fat, the best selection of shoes, such as lace or buckle shoes are sticky. Soles should not be too soft, a lot of people think that soft comfortable shoe, in fact, play a supporting role as detrimental. Also, there are shorter than the flat shoes with good shoes and take up more effort.
The end of production in general, foam material, EVA, or PU. EVA relatively soft, shock well, PU, high hardness, compressive strength. Such as a circle in the red zone http://free40v2.webgarden.com
shall PU material, and the remaining part of pure white EVA. Clearly, such a large place in the medial arch PU Department aim is to use its relatively large density, compressive strength characteristics to suppress internal rotation after landing foot.
2 enclose this beautiful structure called radial stability post. It is made of very hard plastic, and 1, are both to stabilize the arch of.