Advertisement The original Nike Infinity Run was a great shoe. It paired a big chunk of comfortable React cushioning with a rocker in the midsole to make cruising through training runs feel that little bit easier. There was only one real problem – the upper. Some runners found it didn’t provide enough structure to lock down the foot, especially around the midfoot and heel. So with the Infinity Run 2, Nike has done the sensible thing and focused on updating that upper, leaving the rest of the shoe much the same. While I didn’t have any problems with the upper on the Infinity Run 1, I still prefer the design of the new shoe. There is more padding around the heel, and Flywire cables around the midfoot to hold the foot in place comfortably and securely. There’s also a lot of padding on the tongue, which is now more separated from the upper compared with the bootie design of the original Infinity. I’ve heard tell of people accidentally ripping this tongue clean off, and it doesn’t seem very securely attached to the rest of the upper, but so far mine is intact.