"Almost" because the Pegasus Trail 5 is not an overly technical trail running shoe; its lugs are shallow at 3.5mm and there's no toe bumper. Features of a Nike ShoeUpper Materials: Flyknit was a major innovation for Nike when it first came out. Made of strong yet lightweight fibers, it allowed Nike to build zoned support into its running shoe uppers and reduce overall weight. Many other Nike running shoes use engineered mesh, a shoe upper material that's widely used across the industry. Proprietary Foams: Much of running feel comes down to the foam, and Nike's midsoles have enough fast-sounding names it's easy to get confused.