Brett Williams 5 min read ADIDAS’s BOOST MIDSOLE material is one of the most consequential innovations of modern running . The bouncy eTPU compound arguably kicked off the current era of shoe technology, as energy return and plush comfort became just as important as lightweight speed for competitive racers and casual joggers alike. But the landscape it was launched into in 2013 feels like the stone age now, after the advent of carbon plated super shoes and high-stack trainers that took that energy return-over-everything ethos to extremes—so Boost has been largely relegated to lifestyle status of late (at least for serious runners). That changes this year, as Adidas released a new midsole formulation using the familiar name, Hyperboost Pro, which debuts in the Hyperboost Edge . The shoe is designed to be a super trainer, meant for everything between easy shakeouts and long run workouts—but very pointedly, not racing.…