suitable for running shoes. True greatness approached. Maybe not for wider feet, but still wider than Ultraboost 1-4. The metatarsal cage is more comfortable because the new position does not compress the 5th metatarsal laterally as much. Primeknit is only 3/4 of the shoe but a bit stiffer. The heel cup is made of a softer material. There is no reflection on the orange heel line. The booster material is the same as the Ultraboost 19. No carbon fiber plate. The outsole is the same as the Ultraboost 19.