With 138 grams heavy shoes, a female runner smashed the marathon world record by more than two minutes

Almost barefoot!

"The weight of the new Adidas “super shoe,” ... Elite runners initially doubted it could hold up over a long race."

How Adidas Outran Nike With Its $500 ‘Super Shoe’ - WSJ Tigst Assefa’s record-breaking run in the Berlin Marathon delivered a much-needed victory for the German brand in the running-shoe arms race