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For ultra marathon runners looking to push their PR, the Dynafit Ultra Pro 2 Running Shoe is just the ticket. Dynafit designed this shoe to meet the challenges our bodies go through on long-distance races with maximum cushioning, durable foot protection, and reliable traction. The Speedlite midsole is lighter than traditional EVA midsoles while also absorbing tons of impact for lessened fatigue, while the lugged Vibram Megagrip outsole offers surefooted traction over chewed-up, undulating trails.