Inspired by the adidas Mercury Runner—hence the reference to its archival number—the adidas I-5923 ‘Core Red’ melds throwback elements with a future-forward look. The bright red upper is made of mesh with suede touches on the overlays and black branding on the tongue and side. The famous Three-Stripes stays in red, with serrated edges for a classic look, and the heritage vibe continues with the rubber gum outsole.