Nike Free is technology developed by Nike, Inc. and Gerard Hartmann and incorporated into some of their athletic shoes. Nike Free simulates 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.

In 2006 Nike released a new version of the shoe, the Nike Free V2, 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.

In 2007, Nike released a 3rd edition of the shoe, Nike Free V3, which is an update to the V2.