Cushion With Classic Accents. You seen it before, but never like this. Reebok ZOKU RUNNER Ultraknit Gum Men's Casual Shoes in White / Steel / Gum silhouette delivers an evolutionary interpretation of Reebok Classic Leather, pairing heritage details like gum rubber with modern elements. The seamless knit upper forms a sock-like feel, and DMX tech. One piece knit upper for a lightweight, sock-like fit. Low-cut design for a sleek and sophisticated silhouette. DMX Foam midsole cushions for a superior feel. Gum hits on the outsole. High abrasion rubber outsole for traction and durability. Color: White / Steel / Gum.