A Repair Station will help repair your worn out kicks.
Here's a few things to note:
1. Your shoe needs at least one repair remaining to use the Repair Station.
2. Using the Repair Station will use up one of the available repairs.
3. Repair Stations are not all created equally - they apply to different tiers of shoes- tap on the station to ensure that it repairs your desired shoe.
Here's how to use one.
Visit the Map in the app
Look for a Repair Station on the map. It looks like a circle with a hammer inside of it.
Visit that location.
Once inside the radius, you'll get a pop up notification that you're at that location.
Hit "Check in"
Now go to your Me Screen.
At the bottom of that screen you'll see a new button that says "Repair Now"
Hit that, and you can effect the repair.