I had bought after skiing a little too large, I had a sole and they gave me a nod :)! Walking is much more flexible, the cavities loosely tingling feet (especially if you install them in the wrong direction) by a relaxing massage. No doubt they are hot and they take a questionable use in summer noted by other users (for me, 'no problem' in my snow boots) I just use them for a good week, they are totally distorted. Personally, I like this.