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The Nike Zoom Vaporfly 4% was made famous during Nike’s Breaking 2 attempt. Eliud Kipchoge, the fastest marathoner ever, called the system "perfect...really perfect." And he's not the only athlete to rave about it. Top running media outlets also effused it (Men's Journal called it "the fastest shoe on the planet"). But what speaks louder than the praise for the shoe is the top podium spots it has earned while on the feet of the world's most elite runners in major marathons this year. An independent study further backs up the shoe’s performance claims: "The prototype [Nike Vaporfly 4%] shoes lowered the energetic cost of running by 4 percent on average. We predict that with these shoes, top athletes could run substantially faster and achieve the first sub-2-hour marathon." – Hoogkamer, W.,...