American Built. Left and right asymmetrical, non-metallic carbon-fiber toes. KEEN.Dry waterproof, breathable membrane. Waterproof leather upper. Konnectfit heel-capture system for a locked-in feel. TPU Shank for midfoot support. Removable metatomical PU footbed. KEEN Luftcell: Air-infused, PU midsole for weightless comfort. Oil- and slip-resistant non-marking rubber outsole. Dimensions: 90? Heel (5/8" Height).