New Balance New Balance 323. Sports shoe with a flat heel and lace-up fastening. Features a flared midsole and a synthetic, suede and nylon upper with exaggerated fang design inspired by the 320, 355 and Supercomp. Oversized NB branding. Uppers: 100% other materials. Lining: 100% textile. Cushioning: 100% textile. Sole: 100% rubber.