I have very flat feet and I have a lot of problems getting comfortable shoes. I've purchased about every brand of "comfort" shoes and still find that my feet start to ache or get blisters after a while. But these Clarks Wave Whisk are fantastic!! I wove them all during our cross country road trip and during my normal everyday shopping and they still feel great-no aching, sore feet, and no blisters!!  I have purchased the Clarks Wave in closed toed shoes-hope they'll be as wonderful as these sandals!!