My left foot is flat. I wear insoles in my everyday shoes. I never knew arch support slippers existed until I came across these, so I decided to give it a try. Since my left foot is flat, I definitely feel supported. I don't feel it in my right leg as it's not flat, which I think should be. The feeling in my left leg is not uncomfortable and after a few weeks of wearing it I got used to it. I wish I had bought them sooner because wearing regular slippers around the house since I work from home caused my feet to get tired. I would recommend it to others.