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 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.