Nike Free 4.0 V2 Men's football trainers - Black / RedBefore I get into more technical stuff, let me give you some interesting background info on this shoe. Based on the spec sheet I have received along with the sample pair of the Nike Free 4.0 v2.Even if you're a big fan of the Nike Free concept, chances are good the Free 4.0 v2 might not be on your radar. The original Nike Free 4.0V2, appearing briefly in 2006, had a laceless upper that was not a big hit with runners. After 6 years in limbo, the Free 4.0 Reappears as a thoroughly re-envisioned model that received wide praise from our testers.