CRIMSON LACES INCLUDED WITH PURCHASE. The Knit Runner features a lightweight, breathable, stretch knit upper that moves with you. The upper of the knit running shoe features a seamless, breathable and stretch knit sock construction. The outsole lug pattern was designed for multi-environment usage. Reflective laces for visibility when you need it most. Removable molded anatomical sockliner. Lightweight midsole constructed of high rebound Phylon, providing cushioning and durability. Higher durometer medial post. 10mm heel to toe drop.