The boots bottom are made of poor quality gel & rubber, uncomfortable, almost get me fell on the ground several times on solid surfaces like granite. Can't walk a lot with it because the bottom layer is thin and solid, with no soft interior layers. When I run with the boots, my feet hurts, and make a lot of noise like beating the floor with a piece of rubber. I expected more than this with the price I paid. At least the size is fit for my feet, and the design for toes isn't bad, and the black color didn't fade away when washed----that's reason I'm giving 2 stars.