111 | Geoffrey Gray, Heeluxe: Footwear Science and Research
The Drop
00:00
What's the Difference Between a Vapor Fly and an Alpha Fly?
The vapor fly, alpha fly shoe has the airbags underneath the palm of the foot. And I do feel like that shoe holds up pretty well as far as running one or two marathons in it and you're going to be done with that shoe. We'll look at the impact testing of the foam for the vapor fly new and used and show you how much it lost over 150 miles.
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