Always my soles are wrecking first. This is such a waste, because the shoe would be still great without the holes.
It already survived 4 hours of non-stop skateboarding.
Applied a 1 mm rubber-piece with shoe goo. I don`t feel a difference, because it`s only 1 mm thick. Grip is fine. Costs: 90 cent + a small amount of shoe goo. From the inside of the shoe i taped cardboard beneath the insole. Next time I`ll tape a plastic piece instead of cardboard.
Hopefully this will last a few weeks.
Do you know better ways to fix holes on soles?