Shoe Performance when Not Being Used

Synthetic materials like plastic are basically immune to degradation (a double-edged sword considering the waste management implications). Maybe some adhesives could start to fail over the course of many years, but I wouldn’t worry about it. The shoes will be fine in a year’s time. I have a pair of like-new Nike flats that I’ve been sitting on for 5ish years. I have no doubt that they’d be fine if I ever actually put them on to race.

How much performance did you gain in the Vaporfly 4%? I went from (2:51:24) to (2:47:00) in them Sunday morning. Looking forward to running 2:45 or faster in Boston this year. Love love love the shoes. Did I say love!!!!

Got a large PR, but made some fairly substantial adjustments to training in the past eight months so difficult to know how much to attribute to the shoes. In any event, my feet felt GREAT in the late miles—didn’t have to think about them at all (a first in my eleven marathons).