Get all the benefits of running barefoot without sacrificing comfort in the Nike Free 7.0 V2 Running Shoe.Designed to be virtually weightless,you'll get the flexibility and ground-feel you're after with the cushioning and support you need to log the miles.This Nike Free 7.0 V2 shoe has these features:Breathable mesh upper with soft,pliable overlays for lightweight support and flexibility.Minimal seam construction to reduce chafing,with asymmetrical lacing system to reduce pressure.Molded sockliner contours to the natural shape of the foot.Phylite midsole with deep sipes for lightweight cushioning and enhanced flexibility and stability.Rubber outsole with Waffle fill for durability and traction.Nike Free is technology invented by Tobie Hatfield at Nike Air Max Shoes Sale,Inc.and developed in conjunction with Gerard Hartmann and incorporated into some of their athletic shoes.Nike Free attempts to simulate barefoot running while wearing a shoe.As this shoe allows the muscles in the foot to gain strength by providing less constriction,runners are advised to gradually break into the shoe rather than immediately running long distances as to prevent muscle cramps and other discomforts,such as the notorious shin splints.In 2006 Nike released a new version of the shoe,the air max lebron basketball,that addressed some of the durability issues in the earlier model.Among other changes,the heel and sidewalls of the shoe were redesigned to prevent tearing.