Simply put, Nike has designed the greatest marathon racing shoe in history. The Vaporfly 4% is the culmination of a great deal of design research by Nike for the Breaking2 project. If you’re willing to pay almost $300 to get into a major marathon, as well as travel expenses, having the absolute best shoe on your foot for the distance shouldn’t be an afterthought. Although its pricey, this is a great investment in your next marathon PR for serious runners