Whatever material this shoe is made of pokes at you from the inside. I wore them all day and by the end of the day i had a small cut on the side of my foot because it was poking into my skin. Top is very tight as well but I'v been told you have to break the shoe in. Its just so uncomfortable that I dont even want to endure the wait. I never had Tom's before and I was excited to get some but I am extremely disappointed.