Reebok Adult Mens Nano X4 Cross Training Athletic - Walmart.com。Reebok CrossFit Nano 4.0 training shoes in a vibrant red and royal blue colorway. These performance sneakers feature a durable DuraCage upper for protection and support during intense workouts. The low-cut design allows for freedom of motion at the ankles, while the multi-surface outsole provides excellent traction for lifting, running, and jumping. Designed specifically for CrossFit athletes, these shoes include RopePro protection on the medial side to assist with rope climbs and a breathable mesh underlay for temperature regulation.