From the valleys to the ridgelines, the Dynafit Ultra Pro 2 Running Shoe keeps our strikes plush and secure for the long haul. The high stack of light, resilient foam gives us a soft and smooth ride, while the sticky, durable Vibram outsole grips onto everything underfoot to minimize energy-zapping slips and slides. And when that long-run swell starts, we simply release the drawcord a bit and carry on.