The inside sole is super smooth and soft easy to wear without socks and still comfy.
I wore my black ones for dress up occasions while touring Italy and my feet did not hurt me at any time! At the ballpark I had one person after another asking where I bought those cute shoes! And they are so stylish! Another brand I have fell apart after Coachella but these ones haven't snapped in a single place! They are truly made of yoga mat stuff and they mold to the shape of the soles of my feet, giving me just enough arch support and wonderful squishiness that instantly made them my favorite pair of sandals.
Will be ordering them in other colors asap! I took a chance on the pink color and they did not disappoint.