The collaborative release of the Ronnie Fieg x Dover Street Market x 574 Sport 'Grey Special Box' in July 2017 introduced the 574 Sport silhouette, joining the 'Navy Special Box' and 'Black Special Box' iterations. This shoe revamps the iconic New Balance 574 by incorporating Fresh Foam midsole technology and a mesh inner to enhance stability. Adorned with a premium nubuck upper in grey, it showcases perforated panels, asymmetrical co-branded insoles, and additional lace alternatives. As an added touch, Fieg's version boasts unique packaging and interchangeable velcro 'N' logos, offering a choice among 28 distinct leather, nubuck, and 3M variations.