The Nike Free OG 14 Dark Dune Black is a very flexible shoe. This shoe from Nike gives you the feeling that you are walking on your bare feet. Research has shown that it is best for your feet to walk barefoot hard. This shoe mimics that after but still give you the necessary support, cushioning and protection. The Nike Free is an established name in the running scene, with his 10 years of experience we can say that this shoe is a classic. This does not make him less popular indeed.