Evaluation Nike says this is great for all road-race distances up to the marathon for efficient runners. At 164g, wed probably change that to up to 5K for all but elite runners. It actually has reasonably perky cushioning (though we use the word cushioning guardedly), but the Japanese-targeted design is so narrow that many Western runners will feel as though theyre running on half a shoe. For the record, theres a 4mm Zoom Air unit in the rearfoot, and
wet-traction rubber in the heel and forefoot.