Sean Whipp on Twitter: "A better image of Adidas athlete Herpassa Negasa (ETH) and his interesting shoe choice for the Dubai Marathon - dyed Nike VaporFly 4%'s the flavour of the day (
How Do Nike's Vaporfly 4% Shoes Actually Work? - Outside Online
Kevin A. Kirby, DPM - Comparison of Running Economy in Nike Vaporfly 4%, Adidas Adios Boost and Nike Racing Spikes - Will Athletes Start Using Thicker Soled-Cushioned Shoes on the Track for