skin or leather

Didn't medieval shoes have soles and didn't they wear out very soon (NL)?

Medieval shoes had merely a thin sole. To prevent this from wearing out too fast, but also in order to prevent the feet from getting wet, people wore wooden shoes called "trip". These are a kind of wooden slippers which could be worn over the shoe. Experiments show that such shoes are worn out after a couple of months. Probably the medieval people then bought a new pair or had the old ones fixed.

Kierikkikeskus / Kierikki Stone Age Centre (FI)

Member of EXARC
Yes

Kierikki Stone Age Centre is the biggest Stone Age Centre in Finland. It is located 55 kilometres NE from Oulu, the biggest city in Northern Finland, on the banks of the Iijoki river.

The archaeological exhibition at the Kierikki Stone Age Centre displays objects from the Stone Age. In addition, activity programs in the reconstructed Stone Age Village offer a unique opportunity to experience life as it was lived thousands of years ago...