So uncomfortable! I wore them in the house to break them in like I do all shoes and they felt good. Wore them out for a day of shopping and the soles of my feet are still hurting badly! I know they are " trail running" but good grief stepping on a rock would flat out injure your foot in the bottom of these! Wish I had not wore them outside cause now I can't return them and am stuck with them! I have been a fan of Merrell boots and sandels for almost 2 decades and these are worse then a pair of Walmart water shoes as far as comfort!