Reebok Crossfit Nano 2.0 J90890 Mens Orange Mesh Athletic Cross Training Shoes Men's US size 12.5 The legendary Nano 2.0 is back with all the DNA of the original for optimal performance in your functional fitness workouts. Considered by many as one of the best versions of the Nano, its trendy design, sturdy construction, and versatility are some of the qualities wearers love about the shoe. Very good pre-owned condition, minor wear.