I found these shoes over the summer, and may never go back to regular tennis shoes. They are made of one cohesive piece of flexible material that allows the them to mold to your foot and makes them incredibly comfortable. There are a few other shoes that are similar, including the Adidas Ultra Boosts, which may have been the first to introduce this technology. I’ve always put on my tennis shoes without untying them, and the flexible material makes this even easier (though maybe that is just personal preference). This may be the future of leisure shoes, though I don’t love to run in them because they don’t have as much structure.