Air Zoom Alphafly Next Nature uses at least 50 percent recycled materials by weight.
. That shoe, however, underperforms the version which uses synthetic parts—the upper isn’t as secure, the sole not nearly as springy.
Nike’s approach, though, is different. It’s not scooping trash from the water or trying to find new, bio-based materials. Instead, it’s simply cutting down on how many scraps it sends to the dump. Nike’s first foray into wasting less was Flyknit, which launched on theback in 2012. By stitching together a seamless upper, the company eliminated the leftover materials you’d get when cutting patterns out of a sheet of fabric.
The use of recycled foam scraps for the midsole is an interesting choice. Much of the magic in the Alphafly, and even the, comes from that bouncy, springy foam. And we know that when you bond pieces—like gluing multiple layers of foam together—that rigid fused line causes a decrease in cushioning and flexibility. I wanted to see if that’s the case in this model.
Nike asked that I not fully wear-test this demo shoe, but if they really meant that they wouldn’t have sent me a pair in my size, right? So I took it for a short run on our office treadmill. When compared back-to-back to the conventional Alphafly, the sole of the Next Nature feels noticeably firmer to me. It’s still soft and the ride is lively, but the heel, especially, lacks that distinguishable squish-and-release feeling that propels you forward.
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