The New Balance W860M12D (often labelled 860 v12, women's D‑wide) is a stability running shoe built for overpronators who want cushioning and support. It has a Fresh Foam X midsole for plush, responsive cushioning. A dual‑density medial post helps guide the foot and control rolling in. The upper is made from engineered / air mesh with strategic embroidery and layered synthetic/mesh panels for breathable structure. It includes a moulded external heel counter to lock the heel in place, a 10 mm drop heel‑to‑toe, and durable rubber in high‑wear zones of the outsole. The “D” width gives more room across the forefoot and midfoot for wider feet