Adidas ZXZ 123 (550)When the Adidas ZXZ was first released it was considered one of the most technical running sneakers on the market. Now, it's considered an excellent retro runner that offers versatility, comfort and style. Because of its widespread popularity and classic design Adidas has released the ZXZ in many colorways. The ZXZ features a full-grain leather and mesh upper, ghilly lacing system, external heel counter, and a "tire-inspired" outsole. The ZXZ is ultimately a classic shoe that does not disappoint.