Since 2010, Reebok has forged the Nano through sweat, testing, re-designing and re-testing to create our most versatile and dependable cross fit shoe in the box. The Nano 8.0 was developed with insight from the cross fit community, and has been engineered for maximum comfort. The re-engineered flex we a ve upper provides breathability, stability, and durability, and the added cushioning in the forefoot help keep you comfortable. The CrossFit-specific outsole gives you grip in the box so you can hit your prs.