Nike Alphafly 2 Running Trainers Womens The Nike Alphafly 2 Running Trainers will have you going the distance. Engineered with Zoom Air units and full length Zoom X foam for a lightweight feel and unrivalled responsiveness, the trainers come with a carbon fibre plate designed to help you smoothly transition from one foot to the other. Finished off with Atom Knit material on the upper, you'll never look at your favourite pair of old racing shoes the same way again.