The thin knit upper creates good breathability and saves weight. It’s also reinforced at the forefoot, and foam pods at the heel for a secure fit. Offset lacing keeps the shoe snug on your feet, even when you’re hauling.

On the upper, the Flyknit material is constructed with breathability zones in high-heat areas to keep your feet cool, and compared to Nike’s race-oriented models, it features a beefier design that’s more durable, so it can withstand high-mileage training routines. The Nike Invincible 3 is perfectly plush, making it great for long runs—or runs of any distance, if you want a soft, bouncy ride. In our testing, we found its stable, smooth ride made it great for longer efforts, and one of our wear testers loved using it for everyday training. “I have a whole host of daily trainers to choose from,” he said, “and with the exception of speed days, I would choose this shoe over and over.” From introducing runners to EVA cushioning to placing air-filled cells in its shoes, Nike has created some landmark innovations over the years, and it continues to push the boundaries of running shoe design today. To get you acquainted with Nike’s shoes, we’ll walk you through the most important tech found in the brand’s lineup and explain what those features do. The relatively thin midsole is made of a full-length layer of ZoomX foam for a plush-yet-springy ride, and instead of a carbon fiber plate, Nike embedded a short PEBA plate at midfoot. The plate helps stiffen the shoe a bit and stabilize your foot as you run.

Size guide

The Zoom Fly 5 adds a slightly widened midsole at the forefoot and heel for improved stability. Although it’s significantly heavier than the Vaporfly and Alphafly, it offers a similar springy feel underfoot, and it's a great training counterpart to those shoes (you can save the pricier models for race day). The Peg doesn’t come with Nike’s ultra-bouncy and lightweight ZoomX foam, so you might want a different shoe for speedwork days. But for longer efforts and general training runs, the Pegasus offers a smooth ride with enough springiness to keep you surging forward. The Alphafly is the pinnacle of the Nike running shoe lineup, and occupies a vaunted place in the running world. In 2018, elite marathoner Eliud Kipchoge wore an earlier version of this shoe when he (unofficially) became the first person to run a marathon in less than two hours. In contrast to the ultra-thin uppers found on the Vaporfly and Alphafly, it features a durable double-layer mesh upper, which makes it more suitable for grinding through a training schedule.

The forefoot outsole rubber is 2mm thinner, allowing a 2mm increase in forefoot foam for increased cushioning. Nike also scooped out some foam on the sidewall and a channel at the bottom of the shoe to shave off weight. In addition, the medial side of the midsole is shaped to resist compression, which helps the shoe feel less wobbly when cornering. Overall, the Renew Run 2 is an average entry-level shoe. I had mid-expectations and it delivered mid results.Overlays on the seams and toe box add to the durability and lifespan of the shoe. This extra padding and overlays do the shoe no favours in the weight department either. The current model, the Alphafly 2, features thinner outsole rubber and more ZoomX foam at the forefoot. In our testing, we found the shoe created smoother transitions, felt more responsive, and also moved more quietly. If you want the best of the best for your next race, this is it.