The 574 Is The Most Iconic Sneaker In New Balance'S Storied History. This Season We Introduce Our Numeric Version Of The 574 Which Features A Vulcanized Construction With Vaulted Heel Design That Flexes On Impact. We'Ve Reinforced The Toe With Rubber For Durability And Added A Pu Lasting Board That Sits Underneath A Molded Ortholite Insert For Additional Step In Comfort And Support.