From 2015, this shoe was when Nike finally got the Flyknit Lunar right. The 3 was made lighter but has an even sweeter ride. The knit was retooled to hold the heel more comfortably while the weave in the forefoot was given more flexibility. The midsole was reformulated to shift cushioning from the heel to the forefoot so this is heaven for all you midfoot strikers! My very last brand new pair, I still have two other pairs in rotation for training runs. It’s truly an awesome shoe- not too minimalist, not too pillowy.