They need to be worn a few times for the material to break and become softer. Otherwise, you will suffer during hiking!

The worst, stay away.
Terrible construction. After replacing the initial purchase because there wasn't even symmetry in their design and you could see glue everywhere, the second pair suffered from the same issue to a lesser extent. I made the mistake of giving them a chance on the mountain (Smolikas) after wearing them for several days daily. I cried badly on the first day. In the afternoon, I had to go back to the car to wear my nice OnCloud shoes. A waste, it's a shame I spent 170 euros... Unacceptable product for such a specialized company.