Reebok Unisex Nano X4 Training Frwr White Black Reebok Rubber Gum-04Reebox Unisex Nano X4 Training Frwr White Black Reebok Rubber Gum 04 Experience the ultimate in lightweight and breathable training with the Reebox Unisex Nano X4! Designed with enhanced stability and support, these shoes feature a Flexweave upper for ultralight comfort and a midfoot ventilation panel for increased air flow. Plus, with the Lift and Run Chassis and Floatride Energy Foam, you'll feel unstoppable with every stride. FLEXWEAVE woven