New Balance’s 57/40 approaches their iconic 574 silhouette with a fresh point of view and a willingness to experiment. Where the original 574’s go-anywhere versatility was the result of a design that blended road and trail features, the 57/40 combines the familiar with a series of exaggerated features inspired by the bold technical running designs of the ‘80s and ‘90s. An overall sleeker silhouette provided by a slimmer last combines with a range of exaggerated features. The unique midsole combines a flared take on the classic 574 construction with ‘90s tech inspired details, while the mudguard and eyerow feature the distinctive wavy embellishments of the ‘80s. More Details. Leather upper. Stacked midsole blends classic and updated design language. 1980s inspired wavy mudguard and eyerow. Modified tread pattern outsole. Reflective details Oversized ‘N’ branding. Suede/ Textile. Lace.