World Record | Nike Alphafly 2 The new marathon world record shoe is the "Total Orange" Nike Alphafly 2 worn by @kipchogeeliud NO HUMAN… | Instagram
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Kelvin Kiptum breaks the world record at the Chicago Marathon and brings Nike back into the limelight with these shoes
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Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
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