Lace up and work on your miles in these men\\\'s Flex Run 2021 trainers from Nike. These runners have a stretchy mesh upper and are made with at least 20% recycled content by weight. They feature a secure lace up fastening and are sat on a soft foam mid-sole that cushions each stride. The sole is wider under the mid-foot for essential support, while Grooves keep each step flexible. With a grippy tread, these trainers are finished with a woven heel pull for easy on and off, as well as Swoosh branding to the side-walls.