New Balance 323 trainers. These sports shoes feature a flat heel and lace-up fastening. Uppers are made from 100% other materials, with a 100% textile lining and cushioning. The sole is 100% rubber. They also feature a flared midsole, a synthetic, suede and nylon upper with an exaggerated fang design inspired by the 320, 355 and Supercomp, and oversized NB branding.