NIKE Women's Air Zoom Odyssey 2 Running Shoe Synthetic-And-Mesh Rubber sole Shaft measures approximately 2.8" from arch Breathable Flymesh upper with Dynamic Flywire cables for a secure, locked-down fit Dynamic Support platform combines with dual-density foam in the midsole for soft cushioning where you need it and medial support to keep you running strong Duralon rubber in the forefoot for additional cushioning and high-abrasion rubber in the heel for durable traction