The flexible upper features a subtle two-tone effect with contrast stitch detailing

this would make it the third time the shoe released

it has a contrasting rigid heel strap

The durable rubber outsole ensures excellent traction

Adidas ZX Flux Adv X Light Onix Lab4 The flexible upper features aZX FLUX ADV X SHOES THE NEXT STEP IN THE ZX FLUX EVOLUTION. The ZX family of running shoes caught the attention of high mileage runners around 1984 with a futuristic look and feel. Next came the modern, minimal ZX Flux. Today the ZX Flux ADV X is an innovative addition to the family. These shoes are crafted in premium nubuck with a single piece fold over tongue construction. Welded trim and a neoprene heel cage give it a touch of technical style.